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1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31/******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53#include <linux/sched.h>
54#include <linux/slab.h>
55#include <linux/init.h>
56#include <linux/delay.h>
57#include <linux/netdevice.h>
58#include <linux/module.h>
59#include <linux/ethtool.h>
60#include <linux/usb.h>
61#include <linux/timer.h>
62#include <linux/tty.h>
63#include <linux/tty_driver.h>
64#include <linux/tty_flip.h>
65#include <linux/kmod.h>
66#include <linux/rfkill.h>
67#include <linux/ip.h>
68#include <linux/uaccess.h>
69#include <linux/usb/cdc.h>
70#include <net/arp.h>
71#include <asm/byteorder.h>
72#include <linux/serial_core.h>
73#include <linux/serial.h>
74
75
76#define MOD_AUTHOR "Option Wireless"
77#define MOD_DESCRIPTION "USB High Speed Option driver"
78#define MOD_LICENSE "GPL"
79
80#define HSO_MAX_NET_DEVICES 10
81#define HSO__MAX_MTU 2048
82#define DEFAULT_MTU 1500
83#define DEFAULT_MRU 1500
84
85#define CTRL_URB_RX_SIZE 1024
86#define CTRL_URB_TX_SIZE 64
87
88#define BULK_URB_RX_SIZE 4096
89#define BULK_URB_TX_SIZE 8192
90
91#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93#define MUX_BULK_RX_BUF_COUNT 4
94#define USB_TYPE_OPTION_VENDOR 0x20
95
96/* These definitions are used with the struct hso_net flags element */
97/* - use *_bit operations on it. (bit indices not values.) */
98#define HSO_NET_RUNNING 0
99
100#define HSO_NET_TX_TIMEOUT (HZ*10)
101
102#define HSO_SERIAL_MAGIC 0x48534f31
103
104/* Number of ttys to handle */
105#define HSO_SERIAL_TTY_MINORS 256
106
107#define MAX_RX_URBS 2
108
109/*****************************************************************************/
110/* Debugging functions */
111/*****************************************************************************/
112#define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118#define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124#define D1(args...) D_(0x01, ##args)
125#define D2(args...) D_(0x02, ##args)
126#define D3(args...) D_(0x04, ##args)
127#define D4(args...) D_(0x08, ##args)
128#define D5(args...) D_(0x10, ##args)
129
130/*****************************************************************************/
131/* Enumerators */
132/*****************************************************************************/
133enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137};
138
139/*****************************************************************************/
140/* Structs */
141/*****************************************************************************/
142
143struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151};
152
153struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177};
178
179enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183};
184
185#define BM_REQUEST_TYPE (0xa1)
186#define B_NOTIFICATION (0x20)
187#define W_VALUE (0x0)
188#define W_LENGTH (0x2)
189
190#define B_OVERRUN (0x1<<6)
191#define B_PARITY (0x1<<5)
192#define B_FRAMING (0x1<<4)
193#define B_RING_SIGNAL (0x1<<3)
194#define B_BREAK (0x1<<2)
195#define B_TX_CARRIER (0x1<<1)
196#define B_RX_CARRIER (0x1<<0)
197
198struct hso_serial_state_notification {
199 u8 bmRequestType;
200 u8 bNotification;
201 u16 wValue;
202 u16 wIndex;
203 u16 wLength;
204 u16 UART_state_bitmap;
205} __packed;
206
207struct hso_tiocmget {
208 struct mutex mutex;
209 wait_queue_head_t waitq;
210 int intr_completed;
211 struct usb_endpoint_descriptor *endp;
212 struct urb *urb;
213 struct hso_serial_state_notification serial_state_notification;
214 u16 prev_UART_state_bitmap;
215 struct uart_icount icount;
216};
217
218
219struct hso_serial {
220 struct hso_device *parent;
221 int magic;
222 u8 minor;
223
224 struct hso_shared_int *shared_int;
225
226 /* rx/tx urb could be either a bulk urb or a control urb depending
227 on which serial port it is used on. */
228 struct urb *rx_urb[MAX_RX_URBS];
229 u8 num_rx_urbs;
230 u8 *rx_data[MAX_RX_URBS];
231 u16 rx_data_length; /* should contain allocated length */
232
233 struct urb *tx_urb;
234 u8 *tx_data;
235 u8 *tx_buffer;
236 u16 tx_data_length; /* should contain allocated length */
237 u16 tx_data_count;
238 u16 tx_buffer_count;
239 struct usb_ctrlrequest ctrl_req_tx;
240 struct usb_ctrlrequest ctrl_req_rx;
241
242 struct usb_endpoint_descriptor *in_endp;
243 struct usb_endpoint_descriptor *out_endp;
244
245 enum rx_ctrl_state rx_state;
246 u8 rts_state;
247 u8 dtr_state;
248 unsigned tx_urb_used:1;
249
250 struct tty_port port;
251 /* from usb_serial_port */
252 spinlock_t serial_lock;
253
254 int (*write_data) (struct hso_serial *serial);
255 struct hso_tiocmget *tiocmget;
256 /* Hacks required to get flow control
257 * working on the serial receive buffers
258 * so as not to drop characters on the floor.
259 */
260 int curr_rx_urb_idx;
261 u16 curr_rx_urb_offset;
262 u8 rx_urb_filled[MAX_RX_URBS];
263 struct tasklet_struct unthrottle_tasklet;
264 struct work_struct retry_unthrottle_workqueue;
265};
266
267struct hso_device {
268 union {
269 struct hso_serial *dev_serial;
270 struct hso_net *dev_net;
271 } port_data;
272
273 u32 port_spec;
274
275 u8 is_active;
276 u8 usb_gone;
277 struct work_struct async_get_intf;
278 struct work_struct async_put_intf;
279 struct work_struct reset_device;
280
281 struct usb_device *usb;
282 struct usb_interface *interface;
283
284 struct device *dev;
285 struct kref ref;
286 struct mutex mutex;
287};
288
289/* Type of interface */
290#define HSO_INTF_MASK 0xFF00
291#define HSO_INTF_MUX 0x0100
292#define HSO_INTF_BULK 0x0200
293
294/* Type of port */
295#define HSO_PORT_MASK 0xFF
296#define HSO_PORT_NO_PORT 0x0
297#define HSO_PORT_CONTROL 0x1
298#define HSO_PORT_APP 0x2
299#define HSO_PORT_GPS 0x3
300#define HSO_PORT_PCSC 0x4
301#define HSO_PORT_APP2 0x5
302#define HSO_PORT_GPS_CONTROL 0x6
303#define HSO_PORT_MSD 0x7
304#define HSO_PORT_VOICE 0x8
305#define HSO_PORT_DIAG2 0x9
306#define HSO_PORT_DIAG 0x10
307#define HSO_PORT_MODEM 0x11
308#define HSO_PORT_NETWORK 0x12
309
310/* Additional device info */
311#define HSO_INFO_MASK 0xFF000000
312#define HSO_INFO_CRC_BUG 0x01000000
313
314/*****************************************************************************/
315/* Prototypes */
316/*****************************************************************************/
317/* Serial driver functions */
318static int hso_serial_tiocmset(struct tty_struct *tty,
319 unsigned int set, unsigned int clear);
320static void ctrl_callback(struct urb *urb);
321static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
322static void hso_kick_transmit(struct hso_serial *serial);
323/* Helper functions */
324static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
325 struct usb_device *usb, gfp_t gfp);
326static void handle_usb_error(int status, const char *function,
327 struct hso_device *hso_dev);
328static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
329 int type, int dir);
330static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
331static void hso_free_interface(struct usb_interface *intf);
332static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
333static int hso_stop_serial_device(struct hso_device *hso_dev);
334static int hso_start_net_device(struct hso_device *hso_dev);
335static void hso_free_shared_int(struct hso_shared_int *shared_int);
336static int hso_stop_net_device(struct hso_device *hso_dev);
337static void hso_serial_ref_free(struct kref *ref);
338static void hso_std_serial_read_bulk_callback(struct urb *urb);
339static int hso_mux_serial_read(struct hso_serial *serial);
340static void async_get_intf(struct work_struct *data);
341static void async_put_intf(struct work_struct *data);
342static int hso_put_activity(struct hso_device *hso_dev);
343static int hso_get_activity(struct hso_device *hso_dev);
344static void tiocmget_intr_callback(struct urb *urb);
345static void reset_device(struct work_struct *data);
346/*****************************************************************************/
347/* Helping functions */
348/*****************************************************************************/
349
350/* #define DEBUG */
351
352static inline struct hso_net *dev2net(struct hso_device *hso_dev)
353{
354 return hso_dev->port_data.dev_net;
355}
356
357static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
358{
359 return hso_dev->port_data.dev_serial;
360}
361
362/* Debugging functions */
363#ifdef DEBUG
364static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
365 unsigned int len)
366{
367 static char name[255];
368
369 sprintf(name, "hso[%d:%s]", line_count, func_name);
370 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
371}
372
373#define DUMP(buf_, len_) \
374 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
375
376#define DUMP1(buf_, len_) \
377 do { \
378 if (0x01 & debug) \
379 DUMP(buf_, len_); \
380 } while (0)
381#else
382#define DUMP(buf_, len_)
383#define DUMP1(buf_, len_)
384#endif
385
386/* module parameters */
387static int debug;
388static int tty_major;
389static int disable_net;
390
391/* driver info */
392static const char driver_name[] = "hso";
393static const char tty_filename[] = "ttyHS";
394static const char *version = __FILE__ ": " MOD_AUTHOR;
395/* the usb driver itself (registered in hso_init) */
396static struct usb_driver hso_driver;
397/* serial structures */
398static struct tty_driver *tty_drv;
399static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
400static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
401static spinlock_t serial_table_lock;
402
403static const s32 default_port_spec[] = {
404 HSO_INTF_MUX | HSO_PORT_NETWORK,
405 HSO_INTF_BULK | HSO_PORT_DIAG,
406 HSO_INTF_BULK | HSO_PORT_MODEM,
407 0
408};
409
410static const s32 icon321_port_spec[] = {
411 HSO_INTF_MUX | HSO_PORT_NETWORK,
412 HSO_INTF_BULK | HSO_PORT_DIAG2,
413 HSO_INTF_BULK | HSO_PORT_MODEM,
414 HSO_INTF_BULK | HSO_PORT_DIAG,
415 0
416};
417
418#define default_port_device(vendor, product) \
419 USB_DEVICE(vendor, product), \
420 .driver_info = (kernel_ulong_t)default_port_spec
421
422#define icon321_port_device(vendor, product) \
423 USB_DEVICE(vendor, product), \
424 .driver_info = (kernel_ulong_t)icon321_port_spec
425
426/* list of devices we support */
427static const struct usb_device_id hso_ids[] = {
428 {default_port_device(0x0af0, 0x6711)},
429 {default_port_device(0x0af0, 0x6731)},
430 {default_port_device(0x0af0, 0x6751)},
431 {default_port_device(0x0af0, 0x6771)},
432 {default_port_device(0x0af0, 0x6791)},
433 {default_port_device(0x0af0, 0x6811)},
434 {default_port_device(0x0af0, 0x6911)},
435 {default_port_device(0x0af0, 0x6951)},
436 {default_port_device(0x0af0, 0x6971)},
437 {default_port_device(0x0af0, 0x7011)},
438 {default_port_device(0x0af0, 0x7031)},
439 {default_port_device(0x0af0, 0x7051)},
440 {default_port_device(0x0af0, 0x7071)},
441 {default_port_device(0x0af0, 0x7111)},
442 {default_port_device(0x0af0, 0x7211)},
443 {default_port_device(0x0af0, 0x7251)},
444 {default_port_device(0x0af0, 0x7271)},
445 {default_port_device(0x0af0, 0x7311)},
446 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
447 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
448 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
449 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
450 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
451 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
453 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
454 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
455 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
456 {USB_DEVICE(0x0af0, 0x7701)},
457 {USB_DEVICE(0x0af0, 0x7706)},
458 {USB_DEVICE(0x0af0, 0x7801)},
459 {USB_DEVICE(0x0af0, 0x7901)},
460 {USB_DEVICE(0x0af0, 0x7A01)},
461 {USB_DEVICE(0x0af0, 0x7A05)},
462 {USB_DEVICE(0x0af0, 0x8200)},
463 {USB_DEVICE(0x0af0, 0x8201)},
464 {USB_DEVICE(0x0af0, 0x8300)},
465 {USB_DEVICE(0x0af0, 0x8302)},
466 {USB_DEVICE(0x0af0, 0x8304)},
467 {USB_DEVICE(0x0af0, 0x8400)},
468 {USB_DEVICE(0x0af0, 0x8600)},
469 {USB_DEVICE(0x0af0, 0x8800)},
470 {USB_DEVICE(0x0af0, 0x8900)},
471 {USB_DEVICE(0x0af0, 0x9000)},
472 {USB_DEVICE(0x0af0, 0xd035)},
473 {USB_DEVICE(0x0af0, 0xd055)},
474 {USB_DEVICE(0x0af0, 0xd155)},
475 {USB_DEVICE(0x0af0, 0xd255)},
476 {USB_DEVICE(0x0af0, 0xd057)},
477 {USB_DEVICE(0x0af0, 0xd157)},
478 {USB_DEVICE(0x0af0, 0xd257)},
479 {USB_DEVICE(0x0af0, 0xd357)},
480 {USB_DEVICE(0x0af0, 0xd058)},
481 {USB_DEVICE(0x0af0, 0xc100)},
482 {}
483};
484MODULE_DEVICE_TABLE(usb, hso_ids);
485
486/* Sysfs attribute */
487static ssize_t hso_sysfs_show_porttype(struct device *dev,
488 struct device_attribute *attr,
489 char *buf)
490{
491 struct hso_device *hso_dev = dev_get_drvdata(dev);
492 char *port_name;
493
494 if (!hso_dev)
495 return 0;
496
497 switch (hso_dev->port_spec & HSO_PORT_MASK) {
498 case HSO_PORT_CONTROL:
499 port_name = "Control";
500 break;
501 case HSO_PORT_APP:
502 port_name = "Application";
503 break;
504 case HSO_PORT_APP2:
505 port_name = "Application2";
506 break;
507 case HSO_PORT_GPS:
508 port_name = "GPS";
509 break;
510 case HSO_PORT_GPS_CONTROL:
511 port_name = "GPS Control";
512 break;
513 case HSO_PORT_PCSC:
514 port_name = "PCSC";
515 break;
516 case HSO_PORT_DIAG:
517 port_name = "Diagnostic";
518 break;
519 case HSO_PORT_DIAG2:
520 port_name = "Diagnostic2";
521 break;
522 case HSO_PORT_MODEM:
523 port_name = "Modem";
524 break;
525 case HSO_PORT_NETWORK:
526 port_name = "Network";
527 break;
528 default:
529 port_name = "Unknown";
530 break;
531 }
532
533 return sprintf(buf, "%s\n", port_name);
534}
535static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
536
537static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
538{
539 int idx;
540
541 for (idx = 0; idx < serial->num_rx_urbs; idx++)
542 if (serial->rx_urb[idx] == urb)
543 return idx;
544 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
545 return -1;
546}
547
548/* converts mux value to a port spec value */
549static u32 hso_mux_to_port(int mux)
550{
551 u32 result;
552
553 switch (mux) {
554 case 0x1:
555 result = HSO_PORT_CONTROL;
556 break;
557 case 0x2:
558 result = HSO_PORT_APP;
559 break;
560 case 0x4:
561 result = HSO_PORT_PCSC;
562 break;
563 case 0x8:
564 result = HSO_PORT_GPS;
565 break;
566 case 0x10:
567 result = HSO_PORT_APP2;
568 break;
569 default:
570 result = HSO_PORT_NO_PORT;
571 }
572 return result;
573}
574
575/* converts port spec value to a mux value */
576static u32 hso_port_to_mux(int port)
577{
578 u32 result;
579
580 switch (port & HSO_PORT_MASK) {
581 case HSO_PORT_CONTROL:
582 result = 0x0;
583 break;
584 case HSO_PORT_APP:
585 result = 0x1;
586 break;
587 case HSO_PORT_PCSC:
588 result = 0x2;
589 break;
590 case HSO_PORT_GPS:
591 result = 0x3;
592 break;
593 case HSO_PORT_APP2:
594 result = 0x4;
595 break;
596 default:
597 result = 0x0;
598 }
599 return result;
600}
601
602static struct hso_serial *get_serial_by_shared_int_and_type(
603 struct hso_shared_int *shared_int,
604 int mux)
605{
606 int i, port;
607
608 port = hso_mux_to_port(mux);
609
610 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
611 if (serial_table[i] &&
612 (dev2ser(serial_table[i])->shared_int == shared_int) &&
613 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
614 return dev2ser(serial_table[i]);
615 }
616 }
617
618 return NULL;
619}
620
621static struct hso_serial *get_serial_by_index(unsigned index)
622{
623 struct hso_serial *serial = NULL;
624 unsigned long flags;
625
626 spin_lock_irqsave(&serial_table_lock, flags);
627 if (serial_table[index])
628 serial = dev2ser(serial_table[index]);
629 spin_unlock_irqrestore(&serial_table_lock, flags);
630
631 return serial;
632}
633
634static int get_free_serial_index(void)
635{
636 int index;
637 unsigned long flags;
638
639 spin_lock_irqsave(&serial_table_lock, flags);
640 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
641 if (serial_table[index] == NULL) {
642 spin_unlock_irqrestore(&serial_table_lock, flags);
643 return index;
644 }
645 }
646 spin_unlock_irqrestore(&serial_table_lock, flags);
647
648 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
649 return -1;
650}
651
652static void set_serial_by_index(unsigned index, struct hso_serial *serial)
653{
654 unsigned long flags;
655
656 spin_lock_irqsave(&serial_table_lock, flags);
657 if (serial)
658 serial_table[index] = serial->parent;
659 else
660 serial_table[index] = NULL;
661 spin_unlock_irqrestore(&serial_table_lock, flags);
662}
663
664static void handle_usb_error(int status, const char *function,
665 struct hso_device *hso_dev)
666{
667 char *explanation;
668
669 switch (status) {
670 case -ENODEV:
671 explanation = "no device";
672 break;
673 case -ENOENT:
674 explanation = "endpoint not enabled";
675 break;
676 case -EPIPE:
677 explanation = "endpoint stalled";
678 break;
679 case -ENOSPC:
680 explanation = "not enough bandwidth";
681 break;
682 case -ESHUTDOWN:
683 explanation = "device disabled";
684 break;
685 case -EHOSTUNREACH:
686 explanation = "device suspended";
687 break;
688 case -EINVAL:
689 case -EAGAIN:
690 case -EFBIG:
691 case -EMSGSIZE:
692 explanation = "internal error";
693 break;
694 case -EILSEQ:
695 case -EPROTO:
696 case -ETIME:
697 case -ETIMEDOUT:
698 explanation = "protocol error";
699 if (hso_dev)
700 schedule_work(&hso_dev->reset_device);
701 break;
702 default:
703 explanation = "unknown status";
704 break;
705 }
706
707 /* log a meaningful explanation of an USB status */
708 D1("%s: received USB status - %s (%d)", function, explanation, status);
709}
710
711/* Network interface functions */
712
713/* called when net interface is brought up by ifconfig */
714static int hso_net_open(struct net_device *net)
715{
716 struct hso_net *odev = netdev_priv(net);
717 unsigned long flags = 0;
718
719 if (!odev) {
720 dev_err(&net->dev, "No net device !\n");
721 return -ENODEV;
722 }
723
724 odev->skb_tx_buf = NULL;
725
726 /* setup environment */
727 spin_lock_irqsave(&odev->net_lock, flags);
728 odev->rx_parse_state = WAIT_IP;
729 odev->rx_buf_size = 0;
730 odev->rx_buf_missing = sizeof(struct iphdr);
731 spin_unlock_irqrestore(&odev->net_lock, flags);
732
733 /* We are up and running. */
734 set_bit(HSO_NET_RUNNING, &odev->flags);
735 hso_start_net_device(odev->parent);
736
737 /* Tell the kernel we are ready to start receiving from it */
738 netif_start_queue(net);
739
740 return 0;
741}
742
743/* called when interface is brought down by ifconfig */
744static int hso_net_close(struct net_device *net)
745{
746 struct hso_net *odev = netdev_priv(net);
747
748 /* we don't need the queue anymore */
749 netif_stop_queue(net);
750 /* no longer running */
751 clear_bit(HSO_NET_RUNNING, &odev->flags);
752
753 hso_stop_net_device(odev->parent);
754
755 /* done */
756 return 0;
757}
758
759/* USB tells is xmit done, we should start the netqueue again */
760static void write_bulk_callback(struct urb *urb)
761{
762 struct hso_net *odev = urb->context;
763 int status = urb->status;
764
765 /* Sanity check */
766 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
767 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
768 return;
769 }
770
771 /* Do we still have a valid kernel network device? */
772 if (!netif_device_present(odev->net)) {
773 dev_err(&urb->dev->dev, "%s: net device not present\n",
774 __func__);
775 return;
776 }
777
778 /* log status, but don't act on it, we don't need to resubmit anything
779 * anyhow */
780 if (status)
781 handle_usb_error(status, __func__, odev->parent);
782
783 hso_put_activity(odev->parent);
784
785 /* Tell the network interface we are ready for another frame */
786 netif_wake_queue(odev->net);
787}
788
789/* called by kernel when we need to transmit a packet */
790static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
791 struct net_device *net)
792{
793 struct hso_net *odev = netdev_priv(net);
794 int result;
795
796 /* Tell the kernel, "No more frames 'til we are done with this one." */
797 netif_stop_queue(net);
798 if (hso_get_activity(odev->parent) == -EAGAIN) {
799 odev->skb_tx_buf = skb;
800 return NETDEV_TX_OK;
801 }
802
803 /* log if asked */
804 DUMP1(skb->data, skb->len);
805 /* Copy it from kernel memory to OUR memory */
806 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
807 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
808
809 /* Fill in the URB for shipping it out. */
810 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
811 odev->parent->usb,
812 usb_sndbulkpipe(odev->parent->usb,
813 odev->out_endp->
814 bEndpointAddress & 0x7F),
815 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
816 odev);
817
818 /* Deal with the Zero Length packet problem, I hope */
819 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
820
821 /* Send the URB on its merry way. */
822 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
823 if (result) {
824 dev_warn(&odev->parent->interface->dev,
825 "failed mux_bulk_tx_urb %d\n", result);
826 net->stats.tx_errors++;
827 netif_start_queue(net);
828 } else {
829 net->stats.tx_packets++;
830 net->stats.tx_bytes += skb->len;
831 }
832 dev_kfree_skb(skb);
833 /* we're done */
834 return NETDEV_TX_OK;
835}
836
837static const struct ethtool_ops ops = {
838 .get_link = ethtool_op_get_link
839};
840
841/* called when a packet did not ack after watchdogtimeout */
842static void hso_net_tx_timeout(struct net_device *net)
843{
844 struct hso_net *odev = netdev_priv(net);
845
846 if (!odev)
847 return;
848
849 /* Tell syslog we are hosed. */
850 dev_warn(&net->dev, "Tx timed out.\n");
851
852 /* Tear the waiting frame off the list */
853 if (odev->mux_bulk_tx_urb &&
854 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
855 usb_unlink_urb(odev->mux_bulk_tx_urb);
856
857 /* Update statistics */
858 net->stats.tx_errors++;
859}
860
861/* make a real packet from the received USB buffer */
862static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
863 unsigned int count, unsigned char is_eop)
864{
865 unsigned short temp_bytes;
866 unsigned short buffer_offset = 0;
867 unsigned short frame_len;
868 unsigned char *tmp_rx_buf;
869
870 /* log if needed */
871 D1("Rx %d bytes", count);
872 DUMP(ip_pkt, min(128, (int)count));
873
874 while (count) {
875 switch (odev->rx_parse_state) {
876 case WAIT_IP:
877 /* waiting for IP header. */
878 /* wanted bytes - size of ip header */
879 temp_bytes =
880 (count <
881 odev->rx_buf_missing) ? count : odev->
882 rx_buf_missing;
883
884 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
885 odev->rx_buf_size, ip_pkt + buffer_offset,
886 temp_bytes);
887
888 odev->rx_buf_size += temp_bytes;
889 buffer_offset += temp_bytes;
890 odev->rx_buf_missing -= temp_bytes;
891 count -= temp_bytes;
892
893 if (!odev->rx_buf_missing) {
894 /* header is complete allocate an sk_buffer and
895 * continue to WAIT_DATA */
896 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
897
898 if ((frame_len > DEFAULT_MRU) ||
899 (frame_len < sizeof(struct iphdr))) {
900 dev_err(&odev->net->dev,
901 "Invalid frame (%d) length\n",
902 frame_len);
903 odev->rx_parse_state = WAIT_SYNC;
904 continue;
905 }
906 /* Allocate an sk_buff */
907 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
908 frame_len);
909 if (!odev->skb_rx_buf) {
910 /* We got no receive buffer. */
911 D1("could not allocate memory");
912 odev->rx_parse_state = WAIT_SYNC;
913 return;
914 }
915
916 /* Copy what we got so far. make room for iphdr
917 * after tail. */
918 tmp_rx_buf =
919 skb_put(odev->skb_rx_buf,
920 sizeof(struct iphdr));
921 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
922 sizeof(struct iphdr));
923
924 /* ETH_HLEN */
925 odev->rx_buf_size = sizeof(struct iphdr);
926
927 /* Filip actually use .tot_len */
928 odev->rx_buf_missing =
929 frame_len - sizeof(struct iphdr);
930 odev->rx_parse_state = WAIT_DATA;
931 }
932 break;
933
934 case WAIT_DATA:
935 temp_bytes = (count < odev->rx_buf_missing)
936 ? count : odev->rx_buf_missing;
937
938 /* Copy the rest of the bytes that are left in the
939 * buffer into the waiting sk_buf. */
940 /* Make room for temp_bytes after tail. */
941 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
942 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
943
944 odev->rx_buf_missing -= temp_bytes;
945 count -= temp_bytes;
946 buffer_offset += temp_bytes;
947 odev->rx_buf_size += temp_bytes;
948 if (!odev->rx_buf_missing) {
949 /* Packet is complete. Inject into stack. */
950 /* We have IP packet here */
951 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
952 skb_reset_mac_header(odev->skb_rx_buf);
953
954 /* Ship it off to the kernel */
955 netif_rx(odev->skb_rx_buf);
956 /* No longer our buffer. */
957 odev->skb_rx_buf = NULL;
958
959 /* update out statistics */
960 odev->net->stats.rx_packets++;
961
962 odev->net->stats.rx_bytes += odev->rx_buf_size;
963
964 odev->rx_buf_size = 0;
965 odev->rx_buf_missing = sizeof(struct iphdr);
966 odev->rx_parse_state = WAIT_IP;
967 }
968 break;
969
970 case WAIT_SYNC:
971 D1(" W_S");
972 count = 0;
973 break;
974 default:
975 D1(" ");
976 count--;
977 break;
978 }
979 }
980
981 /* Recovery mechanism for WAIT_SYNC state. */
982 if (is_eop) {
983 if (odev->rx_parse_state == WAIT_SYNC) {
984 odev->rx_parse_state = WAIT_IP;
985 odev->rx_buf_size = 0;
986 odev->rx_buf_missing = sizeof(struct iphdr);
987 }
988 }
989}
990
991static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
992{
993 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
994 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
995
996 if (((rest == 5) || (rest == 6)) &&
997 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
998 crc_check, 4)) {
999 urb->actual_length -= 4;
1000 }
1001}
1002
1003/* Moving data from usb to kernel (in interrupt state) */
1004static void read_bulk_callback(struct urb *urb)
1005{
1006 struct hso_net *odev = urb->context;
1007 struct net_device *net;
1008 int result;
1009 int status = urb->status;
1010
1011 /* is al ok? (Filip: Who's Al ?) */
1012 if (status) {
1013 handle_usb_error(status, __func__, odev->parent);
1014 return;
1015 }
1016
1017 /* Sanity check */
1018 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1019 D1("BULK IN callback but driver is not active!");
1020 return;
1021 }
1022 usb_mark_last_busy(urb->dev);
1023
1024 net = odev->net;
1025
1026 if (!netif_device_present(net)) {
1027 /* Somebody killed our network interface... */
1028 return;
1029 }
1030
1031 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1032 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1033
1034 /* do we even have a packet? */
1035 if (urb->actual_length) {
1036 /* Handle the IP stream, add header and push it onto network
1037 * stack if the packet is complete. */
1038 spin_lock(&odev->net_lock);
1039 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1040 (urb->transfer_buffer_length >
1041 urb->actual_length) ? 1 : 0);
1042 spin_unlock(&odev->net_lock);
1043 }
1044
1045 /* We are done with this URB, resubmit it. Prep the USB to wait for
1046 * another frame. Reuse same as received. */
1047 usb_fill_bulk_urb(urb,
1048 odev->parent->usb,
1049 usb_rcvbulkpipe(odev->parent->usb,
1050 odev->in_endp->
1051 bEndpointAddress & 0x7F),
1052 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1053 read_bulk_callback, odev);
1054
1055 /* Give this to the USB subsystem so it can tell us when more data
1056 * arrives. */
1057 result = usb_submit_urb(urb, GFP_ATOMIC);
1058 if (result)
1059 dev_warn(&odev->parent->interface->dev,
1060 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1061 result);
1062}
1063
1064/* Serial driver functions */
1065
1066static void hso_init_termios(struct ktermios *termios)
1067{
1068 /*
1069 * The default requirements for this device are:
1070 */
1071 termios->c_iflag &=
1072 ~(IGNBRK /* disable ignore break */
1073 | BRKINT /* disable break causes interrupt */
1074 | PARMRK /* disable mark parity errors */
1075 | ISTRIP /* disable clear high bit of input characters */
1076 | INLCR /* disable translate NL to CR */
1077 | IGNCR /* disable ignore CR */
1078 | ICRNL /* disable translate CR to NL */
1079 | IXON); /* disable enable XON/XOFF flow control */
1080
1081 /* disable postprocess output characters */
1082 termios->c_oflag &= ~OPOST;
1083
1084 termios->c_lflag &=
1085 ~(ECHO /* disable echo input characters */
1086 | ECHONL /* disable echo new line */
1087 | ICANON /* disable erase, kill, werase, and rprnt
1088 special characters */
1089 | ISIG /* disable interrupt, quit, and suspend special
1090 characters */
1091 | IEXTEN); /* disable non-POSIX special characters */
1092
1093 termios->c_cflag &=
1094 ~(CSIZE /* no size */
1095 | PARENB /* disable parity bit */
1096 | CBAUD /* clear current baud rate */
1097 | CBAUDEX); /* clear current buad rate */
1098
1099 termios->c_cflag |= CS8; /* character size 8 bits */
1100
1101 /* baud rate 115200 */
1102 tty_termios_encode_baud_rate(termios, 115200, 115200);
1103}
1104
1105static void _hso_serial_set_termios(struct tty_struct *tty,
1106 struct ktermios *old)
1107{
1108 struct hso_serial *serial = tty->driver_data;
1109
1110 if (!serial) {
1111 printk(KERN_ERR "%s: no tty structures", __func__);
1112 return;
1113 }
1114
1115 D4("port %d", serial->minor);
1116
1117 /*
1118 * Fix up unsupported bits
1119 */
1120 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1121
1122 tty->termios.c_cflag &=
1123 ~(CSIZE /* no size */
1124 | PARENB /* disable parity bit */
1125 | CBAUD /* clear current baud rate */
1126 | CBAUDEX); /* clear current buad rate */
1127
1128 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1129
1130 /* baud rate 115200 */
1131 tty_encode_baud_rate(tty, 115200, 115200);
1132}
1133
1134static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1135{
1136 int result;
1137 /* We are done with this URB, resubmit it. Prep the USB to wait for
1138 * another frame */
1139 usb_fill_bulk_urb(urb, serial->parent->usb,
1140 usb_rcvbulkpipe(serial->parent->usb,
1141 serial->in_endp->
1142 bEndpointAddress & 0x7F),
1143 urb->transfer_buffer, serial->rx_data_length,
1144 hso_std_serial_read_bulk_callback, serial);
1145 /* Give this to the USB subsystem so it can tell us when more data
1146 * arrives. */
1147 result = usb_submit_urb(urb, GFP_ATOMIC);
1148 if (result) {
1149 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1150 __func__, result);
1151 }
1152}
1153
1154
1155
1156
1157static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1158{
1159 int count;
1160 struct urb *curr_urb;
1161
1162 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1163 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1164 count = put_rxbuf_data(curr_urb, serial);
1165 if (count == -1)
1166 return;
1167 if (count == 0) {
1168 serial->curr_rx_urb_idx++;
1169 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1170 serial->curr_rx_urb_idx = 0;
1171 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1172 }
1173 }
1174}
1175
1176static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1177{
1178 int count = 0;
1179 struct urb *urb;
1180
1181 urb = serial->rx_urb[0];
1182 if (serial->port.count > 0) {
1183 count = put_rxbuf_data(urb, serial);
1184 if (count == -1)
1185 return;
1186 }
1187 /* Re issue a read as long as we receive data. */
1188
1189 if (count == 0 && ((urb->actual_length != 0) ||
1190 (serial->rx_state == RX_PENDING))) {
1191 serial->rx_state = RX_SENT;
1192 hso_mux_serial_read(serial);
1193 } else
1194 serial->rx_state = RX_IDLE;
1195}
1196
1197
1198/* read callback for Diag and CS port */
1199static void hso_std_serial_read_bulk_callback(struct urb *urb)
1200{
1201 struct hso_serial *serial = urb->context;
1202 int status = urb->status;
1203
1204 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1205
1206 /* sanity check */
1207 if (!serial) {
1208 D1("serial == NULL");
1209 return;
1210 }
1211 if (status) {
1212 handle_usb_error(status, __func__, serial->parent);
1213 return;
1214 }
1215
1216 D1("Actual length = %d\n", urb->actual_length);
1217 DUMP1(urb->transfer_buffer, urb->actual_length);
1218
1219 /* Anyone listening? */
1220 if (serial->port.count == 0)
1221 return;
1222
1223 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1224 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1225 /* Valid data, handle RX data */
1226 spin_lock(&serial->serial_lock);
1227 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1228 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1229 spin_unlock(&serial->serial_lock);
1230}
1231
1232/*
1233 * This needs to be a tasklet otherwise we will
1234 * end up recursively calling this function.
1235 */
1236static void hso_unthrottle_tasklet(struct hso_serial *serial)
1237{
1238 unsigned long flags;
1239
1240 spin_lock_irqsave(&serial->serial_lock, flags);
1241 if ((serial->parent->port_spec & HSO_INTF_MUX))
1242 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1243 else
1244 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1245 spin_unlock_irqrestore(&serial->serial_lock, flags);
1246}
1247
1248static void hso_unthrottle(struct tty_struct *tty)
1249{
1250 struct hso_serial *serial = tty->driver_data;
1251
1252 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1253}
1254
1255static void hso_unthrottle_workfunc(struct work_struct *work)
1256{
1257 struct hso_serial *serial =
1258 container_of(work, struct hso_serial,
1259 retry_unthrottle_workqueue);
1260 hso_unthrottle_tasklet(serial);
1261}
1262
1263/* open the requested serial port */
1264static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1265{
1266 struct hso_serial *serial = get_serial_by_index(tty->index);
1267 int result;
1268
1269 /* sanity check */
1270 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1271 WARN_ON(1);
1272 tty->driver_data = NULL;
1273 D1("Failed to open port");
1274 return -ENODEV;
1275 }
1276
1277 mutex_lock(&serial->parent->mutex);
1278 result = usb_autopm_get_interface(serial->parent->interface);
1279 if (result < 0)
1280 goto err_out;
1281
1282 D1("Opening %d", serial->minor);
1283 kref_get(&serial->parent->ref);
1284
1285 /* setup */
1286 tty->driver_data = serial;
1287 tty_port_tty_set(&serial->port, tty);
1288
1289 /* check for port already opened, if not set the termios */
1290 serial->port.count++;
1291 if (serial->port.count == 1) {
1292 serial->rx_state = RX_IDLE;
1293 /* Force default termio settings */
1294 _hso_serial_set_termios(tty, NULL);
1295 tasklet_init(&serial->unthrottle_tasklet,
1296 (void (*)(unsigned long))hso_unthrottle_tasklet,
1297 (unsigned long)serial);
1298 INIT_WORK(&serial->retry_unthrottle_workqueue,
1299 hso_unthrottle_workfunc);
1300 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1301 if (result) {
1302 hso_stop_serial_device(serial->parent);
1303 serial->port.count--;
1304 kref_put(&serial->parent->ref, hso_serial_ref_free);
1305 }
1306 } else {
1307 D1("Port was already open");
1308 }
1309
1310 usb_autopm_put_interface(serial->parent->interface);
1311
1312 /* done */
1313 if (result)
1314 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1315err_out:
1316 mutex_unlock(&serial->parent->mutex);
1317 return result;
1318}
1319
1320/* close the requested serial port */
1321static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1322{
1323 struct hso_serial *serial = tty->driver_data;
1324 u8 usb_gone;
1325
1326 D1("Closing serial port");
1327
1328 /* Open failed, no close cleanup required */
1329 if (serial == NULL)
1330 return;
1331
1332 mutex_lock(&serial->parent->mutex);
1333 usb_gone = serial->parent->usb_gone;
1334
1335 if (!usb_gone)
1336 usb_autopm_get_interface(serial->parent->interface);
1337
1338 /* reset the rts and dtr */
1339 /* do the actual close */
1340 serial->port.count--;
1341
1342 if (serial->port.count <= 0) {
1343 serial->port.count = 0;
1344 tty_port_tty_set(&serial->port, NULL);
1345 if (!usb_gone)
1346 hso_stop_serial_device(serial->parent);
1347 tasklet_kill(&serial->unthrottle_tasklet);
1348 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1349 }
1350
1351 if (!usb_gone)
1352 usb_autopm_put_interface(serial->parent->interface);
1353
1354 mutex_unlock(&serial->parent->mutex);
1355
1356 kref_put(&serial->parent->ref, hso_serial_ref_free);
1357}
1358
1359/* close the requested serial port */
1360static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1361 int count)
1362{
1363 struct hso_serial *serial = tty->driver_data;
1364 int space, tx_bytes;
1365 unsigned long flags;
1366
1367 /* sanity check */
1368 if (serial == NULL) {
1369 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1370 return -ENODEV;
1371 }
1372
1373 spin_lock_irqsave(&serial->serial_lock, flags);
1374
1375 space = serial->tx_data_length - serial->tx_buffer_count;
1376 tx_bytes = (count < space) ? count : space;
1377
1378 if (!tx_bytes)
1379 goto out;
1380
1381 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1382 serial->tx_buffer_count += tx_bytes;
1383
1384out:
1385 spin_unlock_irqrestore(&serial->serial_lock, flags);
1386
1387 hso_kick_transmit(serial);
1388 /* done */
1389 return tx_bytes;
1390}
1391
1392/* how much room is there for writing */
1393static int hso_serial_write_room(struct tty_struct *tty)
1394{
1395 struct hso_serial *serial = tty->driver_data;
1396 int room;
1397 unsigned long flags;
1398
1399 spin_lock_irqsave(&serial->serial_lock, flags);
1400 room = serial->tx_data_length - serial->tx_buffer_count;
1401 spin_unlock_irqrestore(&serial->serial_lock, flags);
1402
1403 /* return free room */
1404 return room;
1405}
1406
1407/* setup the term */
1408static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1409{
1410 struct hso_serial *serial = tty->driver_data;
1411 unsigned long flags;
1412
1413 if (old)
1414 D5("Termios called with: cflags new[%d] - old[%d]",
1415 tty->termios.c_cflag, old->c_cflag);
1416
1417 /* the actual setup */
1418 spin_lock_irqsave(&serial->serial_lock, flags);
1419 if (serial->port.count)
1420 _hso_serial_set_termios(tty, old);
1421 else
1422 tty->termios = *old;
1423 spin_unlock_irqrestore(&serial->serial_lock, flags);
1424
1425 /* done */
1426}
1427
1428/* how many characters in the buffer */
1429static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1430{
1431 struct hso_serial *serial = tty->driver_data;
1432 int chars;
1433 unsigned long flags;
1434
1435 /* sanity check */
1436 if (serial == NULL)
1437 return 0;
1438
1439 spin_lock_irqsave(&serial->serial_lock, flags);
1440 chars = serial->tx_buffer_count;
1441 spin_unlock_irqrestore(&serial->serial_lock, flags);
1442
1443 return chars;
1444}
1445static int tiocmget_submit_urb(struct hso_serial *serial,
1446 struct hso_tiocmget *tiocmget,
1447 struct usb_device *usb)
1448{
1449 int result;
1450
1451 if (serial->parent->usb_gone)
1452 return -ENODEV;
1453 usb_fill_int_urb(tiocmget->urb, usb,
1454 usb_rcvintpipe(usb,
1455 tiocmget->endp->
1456 bEndpointAddress & 0x7F),
1457 &tiocmget->serial_state_notification,
1458 sizeof(struct hso_serial_state_notification),
1459 tiocmget_intr_callback, serial,
1460 tiocmget->endp->bInterval);
1461 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1462 if (result) {
1463 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1464 result);
1465 }
1466 return result;
1467
1468}
1469
1470static void tiocmget_intr_callback(struct urb *urb)
1471{
1472 struct hso_serial *serial = urb->context;
1473 struct hso_tiocmget *tiocmget;
1474 int status = urb->status;
1475 u16 UART_state_bitmap, prev_UART_state_bitmap;
1476 struct uart_icount *icount;
1477 struct hso_serial_state_notification *serial_state_notification;
1478 struct usb_device *usb;
1479 int if_num;
1480
1481 /* Sanity checks */
1482 if (!serial)
1483 return;
1484 if (status) {
1485 handle_usb_error(status, __func__, serial->parent);
1486 return;
1487 }
1488
1489 /* tiocmget is only supported on HSO_PORT_MODEM */
1490 tiocmget = serial->tiocmget;
1491 if (!tiocmget)
1492 return;
1493 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1494
1495 usb = serial->parent->usb;
1496 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1497
1498 /* wIndex should be the USB interface number of the port to which the
1499 * notification applies, which should always be the Modem port.
1500 */
1501 serial_state_notification = &tiocmget->serial_state_notification;
1502 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1503 serial_state_notification->bNotification != B_NOTIFICATION ||
1504 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1505 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1506 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1507 dev_warn(&usb->dev,
1508 "hso received invalid serial state notification\n");
1509 DUMP(serial_state_notification,
1510 sizeof(struct hso_serial_state_notification));
1511 } else {
1512
1513 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1514 UART_state_bitmap);
1515 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1516 icount = &tiocmget->icount;
1517 spin_lock(&serial->serial_lock);
1518 if ((UART_state_bitmap & B_OVERRUN) !=
1519 (prev_UART_state_bitmap & B_OVERRUN))
1520 icount->parity++;
1521 if ((UART_state_bitmap & B_PARITY) !=
1522 (prev_UART_state_bitmap & B_PARITY))
1523 icount->parity++;
1524 if ((UART_state_bitmap & B_FRAMING) !=
1525 (prev_UART_state_bitmap & B_FRAMING))
1526 icount->frame++;
1527 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1528 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1529 icount->rng++;
1530 if ((UART_state_bitmap & B_BREAK) !=
1531 (prev_UART_state_bitmap & B_BREAK))
1532 icount->brk++;
1533 if ((UART_state_bitmap & B_TX_CARRIER) !=
1534 (prev_UART_state_bitmap & B_TX_CARRIER))
1535 icount->dsr++;
1536 if ((UART_state_bitmap & B_RX_CARRIER) !=
1537 (prev_UART_state_bitmap & B_RX_CARRIER))
1538 icount->dcd++;
1539 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1540 spin_unlock(&serial->serial_lock);
1541 tiocmget->intr_completed = 1;
1542 wake_up_interruptible(&tiocmget->waitq);
1543 }
1544 memset(serial_state_notification, 0,
1545 sizeof(struct hso_serial_state_notification));
1546 tiocmget_submit_urb(serial,
1547 tiocmget,
1548 serial->parent->usb);
1549}
1550
1551/*
1552 * next few functions largely stolen from drivers/serial/serial_core.c
1553 */
1554/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1555 * - mask passed in arg for lines of interest
1556 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1557 * Caller should use TIOCGICOUNT to see which one it was
1558 */
1559static int
1560hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1561{
1562 DECLARE_WAITQUEUE(wait, current);
1563 struct uart_icount cprev, cnow;
1564 struct hso_tiocmget *tiocmget;
1565 int ret;
1566
1567 tiocmget = serial->tiocmget;
1568 if (!tiocmget)
1569 return -ENOENT;
1570 /*
1571 * note the counters on entry
1572 */
1573 spin_lock_irq(&serial->serial_lock);
1574 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1575 spin_unlock_irq(&serial->serial_lock);
1576 add_wait_queue(&tiocmget->waitq, &wait);
1577 for (;;) {
1578 spin_lock_irq(&serial->serial_lock);
1579 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1580 spin_unlock_irq(&serial->serial_lock);
1581 set_current_state(TASK_INTERRUPTIBLE);
1582 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1583 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1584 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1585 ret = 0;
1586 break;
1587 }
1588 schedule();
1589 /* see if a signal did it */
1590 if (signal_pending(current)) {
1591 ret = -ERESTARTSYS;
1592 break;
1593 }
1594 cprev = cnow;
1595 }
1596 current->state = TASK_RUNNING;
1597 remove_wait_queue(&tiocmget->waitq, &wait);
1598
1599 return ret;
1600}
1601
1602/*
1603 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1604 * Return: write counters to the user passed counter struct
1605 * NB: both 1->0 and 0->1 transitions are counted except for
1606 * RI where only 0->1 is counted.
1607 */
1608static int hso_get_count(struct tty_struct *tty,
1609 struct serial_icounter_struct *icount)
1610{
1611 struct uart_icount cnow;
1612 struct hso_serial *serial = tty->driver_data;
1613 struct hso_tiocmget *tiocmget = serial->tiocmget;
1614
1615 memset(icount, 0, sizeof(struct serial_icounter_struct));
1616
1617 if (!tiocmget)
1618 return -ENOENT;
1619 spin_lock_irq(&serial->serial_lock);
1620 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1621 spin_unlock_irq(&serial->serial_lock);
1622
1623 icount->cts = cnow.cts;
1624 icount->dsr = cnow.dsr;
1625 icount->rng = cnow.rng;
1626 icount->dcd = cnow.dcd;
1627 icount->rx = cnow.rx;
1628 icount->tx = cnow.tx;
1629 icount->frame = cnow.frame;
1630 icount->overrun = cnow.overrun;
1631 icount->parity = cnow.parity;
1632 icount->brk = cnow.brk;
1633 icount->buf_overrun = cnow.buf_overrun;
1634
1635 return 0;
1636}
1637
1638
1639static int hso_serial_tiocmget(struct tty_struct *tty)
1640{
1641 int retval;
1642 struct hso_serial *serial = tty->driver_data;
1643 struct hso_tiocmget *tiocmget;
1644 u16 UART_state_bitmap;
1645
1646 /* sanity check */
1647 if (!serial) {
1648 D1("no tty structures");
1649 return -EINVAL;
1650 }
1651 spin_lock_irq(&serial->serial_lock);
1652 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1653 ((serial->dtr_state) ? TIOCM_DTR : 0);
1654 tiocmget = serial->tiocmget;
1655 if (tiocmget) {
1656
1657 UART_state_bitmap = le16_to_cpu(
1658 tiocmget->prev_UART_state_bitmap);
1659 if (UART_state_bitmap & B_RING_SIGNAL)
1660 retval |= TIOCM_RNG;
1661 if (UART_state_bitmap & B_RX_CARRIER)
1662 retval |= TIOCM_CD;
1663 if (UART_state_bitmap & B_TX_CARRIER)
1664 retval |= TIOCM_DSR;
1665 }
1666 spin_unlock_irq(&serial->serial_lock);
1667 return retval;
1668}
1669
1670static int hso_serial_tiocmset(struct tty_struct *tty,
1671 unsigned int set, unsigned int clear)
1672{
1673 int val = 0;
1674 unsigned long flags;
1675 int if_num;
1676 struct hso_serial *serial = tty->driver_data;
1677
1678 /* sanity check */
1679 if (!serial) {
1680 D1("no tty structures");
1681 return -EINVAL;
1682 }
1683
1684 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1685 return -EINVAL;
1686
1687 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1688
1689 spin_lock_irqsave(&serial->serial_lock, flags);
1690 if (set & TIOCM_RTS)
1691 serial->rts_state = 1;
1692 if (set & TIOCM_DTR)
1693 serial->dtr_state = 1;
1694
1695 if (clear & TIOCM_RTS)
1696 serial->rts_state = 0;
1697 if (clear & TIOCM_DTR)
1698 serial->dtr_state = 0;
1699
1700 if (serial->dtr_state)
1701 val |= 0x01;
1702 if (serial->rts_state)
1703 val |= 0x02;
1704
1705 spin_unlock_irqrestore(&serial->serial_lock, flags);
1706
1707 return usb_control_msg(serial->parent->usb,
1708 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1709 0x21, val, if_num, NULL, 0,
1710 USB_CTRL_SET_TIMEOUT);
1711}
1712
1713static int hso_serial_ioctl(struct tty_struct *tty,
1714 unsigned int cmd, unsigned long arg)
1715{
1716 struct hso_serial *serial = tty->driver_data;
1717 int ret = 0;
1718 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1719
1720 if (!serial)
1721 return -ENODEV;
1722 switch (cmd) {
1723 case TIOCMIWAIT:
1724 ret = hso_wait_modem_status(serial, arg);
1725 break;
1726 default:
1727 ret = -ENOIOCTLCMD;
1728 break;
1729 }
1730 return ret;
1731}
1732
1733
1734/* starts a transmit */
1735static void hso_kick_transmit(struct hso_serial *serial)
1736{
1737 u8 *temp;
1738 unsigned long flags;
1739 int res;
1740
1741 spin_lock_irqsave(&serial->serial_lock, flags);
1742 if (!serial->tx_buffer_count)
1743 goto out;
1744
1745 if (serial->tx_urb_used)
1746 goto out;
1747
1748 /* Wakeup USB interface if necessary */
1749 if (hso_get_activity(serial->parent) == -EAGAIN)
1750 goto out;
1751
1752 /* Switch pointers around to avoid memcpy */
1753 temp = serial->tx_buffer;
1754 serial->tx_buffer = serial->tx_data;
1755 serial->tx_data = temp;
1756 serial->tx_data_count = serial->tx_buffer_count;
1757 serial->tx_buffer_count = 0;
1758
1759 /* If temp is set, it means we switched buffers */
1760 if (temp && serial->write_data) {
1761 res = serial->write_data(serial);
1762 if (res >= 0)
1763 serial->tx_urb_used = 1;
1764 }
1765out:
1766 spin_unlock_irqrestore(&serial->serial_lock, flags);
1767}
1768
1769/* make a request (for reading and writing data to muxed serial port) */
1770static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1771 struct urb *ctrl_urb,
1772 struct usb_ctrlrequest *ctrl_req,
1773 u8 *ctrl_urb_data, u32 size)
1774{
1775 int result;
1776 int pipe;
1777
1778 /* Sanity check */
1779 if (!serial || !ctrl_urb || !ctrl_req) {
1780 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1781 return -EINVAL;
1782 }
1783
1784 /* initialize */
1785 ctrl_req->wValue = 0;
1786 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1787 ctrl_req->wLength = cpu_to_le16(size);
1788
1789 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1790 /* Reading command */
1791 ctrl_req->bRequestType = USB_DIR_IN |
1792 USB_TYPE_OPTION_VENDOR |
1793 USB_RECIP_INTERFACE;
1794 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1795 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1796 } else {
1797 /* Writing command */
1798 ctrl_req->bRequestType = USB_DIR_OUT |
1799 USB_TYPE_OPTION_VENDOR |
1800 USB_RECIP_INTERFACE;
1801 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1802 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1803 }
1804 /* syslog */
1805 D2("%s command (%02x) len: %d, port: %d",
1806 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1807 ctrl_req->bRequestType, ctrl_req->wLength, port);
1808
1809 /* Load ctrl urb */
1810 ctrl_urb->transfer_flags = 0;
1811 usb_fill_control_urb(ctrl_urb,
1812 serial->parent->usb,
1813 pipe,
1814 (u8 *) ctrl_req,
1815 ctrl_urb_data, size, ctrl_callback, serial);
1816 /* Send it on merry way */
1817 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1818 if (result) {
1819 dev_err(&ctrl_urb->dev->dev,
1820 "%s failed submit ctrl_urb %d type %d\n", __func__,
1821 result, type);
1822 return result;
1823 }
1824
1825 /* done */
1826 return size;
1827}
1828
1829/* called by intr_callback when read occurs */
1830static int hso_mux_serial_read(struct hso_serial *serial)
1831{
1832 if (!serial)
1833 return -EINVAL;
1834
1835 /* clean data */
1836 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1837 /* make the request */
1838
1839 if (serial->num_rx_urbs != 1) {
1840 dev_err(&serial->parent->interface->dev,
1841 "ERROR: mux'd reads with multiple buffers "
1842 "not possible\n");
1843 return 0;
1844 }
1845 return mux_device_request(serial,
1846 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1847 serial->parent->port_spec & HSO_PORT_MASK,
1848 serial->rx_urb[0],
1849 &serial->ctrl_req_rx,
1850 serial->rx_data[0], serial->rx_data_length);
1851}
1852
1853/* used for muxed serial port callback (muxed serial read) */
1854static void intr_callback(struct urb *urb)
1855{
1856 struct hso_shared_int *shared_int = urb->context;
1857 struct hso_serial *serial;
1858 unsigned char *port_req;
1859 int status = urb->status;
1860 int i;
1861
1862 usb_mark_last_busy(urb->dev);
1863
1864 /* sanity check */
1865 if (!shared_int)
1866 return;
1867
1868 /* status check */
1869 if (status) {
1870 handle_usb_error(status, __func__, NULL);
1871 return;
1872 }
1873 D4("\n--- Got intr callback 0x%02X ---", status);
1874
1875 /* what request? */
1876 port_req = urb->transfer_buffer;
1877 D4(" port_req = 0x%.2X\n", *port_req);
1878 /* loop over all muxed ports to find the one sending this */
1879 for (i = 0; i < 8; i++) {
1880 /* max 8 channels on MUX */
1881 if (*port_req & (1 << i)) {
1882 serial = get_serial_by_shared_int_and_type(shared_int,
1883 (1 << i));
1884 if (serial != NULL) {
1885 D1("Pending read interrupt on port %d\n", i);
1886 spin_lock(&serial->serial_lock);
1887 if (serial->rx_state == RX_IDLE &&
1888 serial->port.count > 0) {
1889 /* Setup and send a ctrl req read on
1890 * port i */
1891 if (!serial->rx_urb_filled[0]) {
1892 serial->rx_state = RX_SENT;
1893 hso_mux_serial_read(serial);
1894 } else
1895 serial->rx_state = RX_PENDING;
1896 } else {
1897 D1("Already a read pending on "
1898 "port %d or port not open\n", i);
1899 }
1900 spin_unlock(&serial->serial_lock);
1901 }
1902 }
1903 }
1904 /* Resubmit interrupt urb */
1905 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1906}
1907
1908/* called for writing to muxed serial port */
1909static int hso_mux_serial_write_data(struct hso_serial *serial)
1910{
1911 if (NULL == serial)
1912 return -EINVAL;
1913
1914 return mux_device_request(serial,
1915 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1916 serial->parent->port_spec & HSO_PORT_MASK,
1917 serial->tx_urb,
1918 &serial->ctrl_req_tx,
1919 serial->tx_data, serial->tx_data_count);
1920}
1921
1922/* write callback for Diag and CS port */
1923static void hso_std_serial_write_bulk_callback(struct urb *urb)
1924{
1925 struct hso_serial *serial = urb->context;
1926 int status = urb->status;
1927
1928 /* sanity check */
1929 if (!serial) {
1930 D1("serial == NULL");
1931 return;
1932 }
1933
1934 spin_lock(&serial->serial_lock);
1935 serial->tx_urb_used = 0;
1936 spin_unlock(&serial->serial_lock);
1937 if (status) {
1938 handle_usb_error(status, __func__, serial->parent);
1939 return;
1940 }
1941 hso_put_activity(serial->parent);
1942 tty_port_tty_wakeup(&serial->port);
1943 hso_kick_transmit(serial);
1944
1945 D1(" ");
1946}
1947
1948/* called for writing diag or CS serial port */
1949static int hso_std_serial_write_data(struct hso_serial *serial)
1950{
1951 int count = serial->tx_data_count;
1952 int result;
1953
1954 usb_fill_bulk_urb(serial->tx_urb,
1955 serial->parent->usb,
1956 usb_sndbulkpipe(serial->parent->usb,
1957 serial->out_endp->
1958 bEndpointAddress & 0x7F),
1959 serial->tx_data, serial->tx_data_count,
1960 hso_std_serial_write_bulk_callback, serial);
1961
1962 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1963 if (result) {
1964 dev_warn(&serial->parent->usb->dev,
1965 "Failed to submit urb - res %d\n", result);
1966 return result;
1967 }
1968
1969 return count;
1970}
1971
1972/* callback after read or write on muxed serial port */
1973static void ctrl_callback(struct urb *urb)
1974{
1975 struct hso_serial *serial = urb->context;
1976 struct usb_ctrlrequest *req;
1977 int status = urb->status;
1978
1979 /* sanity check */
1980 if (!serial)
1981 return;
1982
1983 spin_lock(&serial->serial_lock);
1984 serial->tx_urb_used = 0;
1985 spin_unlock(&serial->serial_lock);
1986 if (status) {
1987 handle_usb_error(status, __func__, serial->parent);
1988 return;
1989 }
1990
1991 /* what request? */
1992 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1993 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1994 D4("Actual length of urb = %d\n", urb->actual_length);
1995 DUMP1(urb->transfer_buffer, urb->actual_length);
1996
1997 if (req->bRequestType ==
1998 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1999 /* response to a read command */
2000 serial->rx_urb_filled[0] = 1;
2001 spin_lock(&serial->serial_lock);
2002 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2003 spin_unlock(&serial->serial_lock);
2004 } else {
2005 hso_put_activity(serial->parent);
2006 tty_port_tty_wakeup(&serial->port);
2007 /* response to a write command */
2008 hso_kick_transmit(serial);
2009 }
2010}
2011
2012/* handle RX data for serial port */
2013static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2014{
2015 struct tty_struct *tty;
2016 int write_length_remaining = 0;
2017 int curr_write_len;
2018
2019 /* Sanity check */
2020 if (urb == NULL || serial == NULL) {
2021 D1("serial = NULL");
2022 return -2;
2023 }
2024
2025 tty = tty_port_tty_get(&serial->port);
2026
2027 /* Push data to tty */
2028 write_length_remaining = urb->actual_length -
2029 serial->curr_rx_urb_offset;
2030 D1("data to push to tty");
2031 while (write_length_remaining) {
2032 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2033 tty_kref_put(tty);
2034 return -1;
2035 }
2036 curr_write_len = tty_insert_flip_string(&serial->port,
2037 urb->transfer_buffer + serial->curr_rx_urb_offset,
2038 write_length_remaining);
2039 serial->curr_rx_urb_offset += curr_write_len;
2040 write_length_remaining -= curr_write_len;
2041 tty_flip_buffer_push(&serial->port);
2042 }
2043 tty_kref_put(tty);
2044
2045 if (write_length_remaining == 0) {
2046 serial->curr_rx_urb_offset = 0;
2047 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2048 }
2049 return write_length_remaining;
2050}
2051
2052
2053/* Base driver functions */
2054
2055static void hso_log_port(struct hso_device *hso_dev)
2056{
2057 char *port_type;
2058 char port_dev[20];
2059
2060 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2061 case HSO_PORT_CONTROL:
2062 port_type = "Control";
2063 break;
2064 case HSO_PORT_APP:
2065 port_type = "Application";
2066 break;
2067 case HSO_PORT_GPS:
2068 port_type = "GPS";
2069 break;
2070 case HSO_PORT_GPS_CONTROL:
2071 port_type = "GPS control";
2072 break;
2073 case HSO_PORT_APP2:
2074 port_type = "Application2";
2075 break;
2076 case HSO_PORT_PCSC:
2077 port_type = "PCSC";
2078 break;
2079 case HSO_PORT_DIAG:
2080 port_type = "Diagnostic";
2081 break;
2082 case HSO_PORT_DIAG2:
2083 port_type = "Diagnostic2";
2084 break;
2085 case HSO_PORT_MODEM:
2086 port_type = "Modem";
2087 break;
2088 case HSO_PORT_NETWORK:
2089 port_type = "Network";
2090 break;
2091 default:
2092 port_type = "Unknown";
2093 break;
2094 }
2095 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2096 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2097 } else
2098 sprintf(port_dev, "/dev/%s%d", tty_filename,
2099 dev2ser(hso_dev)->minor);
2100
2101 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2102 port_type, port_dev);
2103}
2104
2105static int hso_start_net_device(struct hso_device *hso_dev)
2106{
2107 int i, result = 0;
2108 struct hso_net *hso_net = dev2net(hso_dev);
2109
2110 if (!hso_net)
2111 return -ENODEV;
2112
2113 /* send URBs for all read buffers */
2114 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2115
2116 /* Prep a receive URB */
2117 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2118 hso_dev->usb,
2119 usb_rcvbulkpipe(hso_dev->usb,
2120 hso_net->in_endp->
2121 bEndpointAddress & 0x7F),
2122 hso_net->mux_bulk_rx_buf_pool[i],
2123 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2124 hso_net);
2125
2126 /* Put it out there so the device can send us stuff */
2127 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2128 GFP_NOIO);
2129 if (result)
2130 dev_warn(&hso_dev->usb->dev,
2131 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2132 i, result);
2133 }
2134
2135 return result;
2136}
2137
2138static int hso_stop_net_device(struct hso_device *hso_dev)
2139{
2140 int i;
2141 struct hso_net *hso_net = dev2net(hso_dev);
2142
2143 if (!hso_net)
2144 return -ENODEV;
2145
2146 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2147 if (hso_net->mux_bulk_rx_urb_pool[i])
2148 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2149
2150 }
2151 if (hso_net->mux_bulk_tx_urb)
2152 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2153
2154 return 0;
2155}
2156
2157static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2158{
2159 int i, result = 0;
2160 struct hso_serial *serial = dev2ser(hso_dev);
2161
2162 if (!serial)
2163 return -ENODEV;
2164
2165 /* If it is not the MUX port fill in and submit a bulk urb (already
2166 * allocated in hso_serial_start) */
2167 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2168 for (i = 0; i < serial->num_rx_urbs; i++) {
2169 usb_fill_bulk_urb(serial->rx_urb[i],
2170 serial->parent->usb,
2171 usb_rcvbulkpipe(serial->parent->usb,
2172 serial->in_endp->
2173 bEndpointAddress &
2174 0x7F),
2175 serial->rx_data[i],
2176 serial->rx_data_length,
2177 hso_std_serial_read_bulk_callback,
2178 serial);
2179 result = usb_submit_urb(serial->rx_urb[i], flags);
2180 if (result) {
2181 dev_warn(&serial->parent->usb->dev,
2182 "Failed to submit urb - res %d\n",
2183 result);
2184 break;
2185 }
2186 }
2187 } else {
2188 mutex_lock(&serial->shared_int->shared_int_lock);
2189 if (!serial->shared_int->use_count) {
2190 result =
2191 hso_mux_submit_intr_urb(serial->shared_int,
2192 hso_dev->usb, flags);
2193 }
2194 serial->shared_int->use_count++;
2195 mutex_unlock(&serial->shared_int->shared_int_lock);
2196 }
2197 if (serial->tiocmget)
2198 tiocmget_submit_urb(serial,
2199 serial->tiocmget,
2200 serial->parent->usb);
2201 return result;
2202}
2203
2204static int hso_stop_serial_device(struct hso_device *hso_dev)
2205{
2206 int i;
2207 struct hso_serial *serial = dev2ser(hso_dev);
2208 struct hso_tiocmget *tiocmget;
2209
2210 if (!serial)
2211 return -ENODEV;
2212
2213 for (i = 0; i < serial->num_rx_urbs; i++) {
2214 if (serial->rx_urb[i]) {
2215 usb_kill_urb(serial->rx_urb[i]);
2216 serial->rx_urb_filled[i] = 0;
2217 }
2218 }
2219 serial->curr_rx_urb_idx = 0;
2220 serial->curr_rx_urb_offset = 0;
2221
2222 if (serial->tx_urb)
2223 usb_kill_urb(serial->tx_urb);
2224
2225 if (serial->shared_int) {
2226 mutex_lock(&serial->shared_int->shared_int_lock);
2227 if (serial->shared_int->use_count &&
2228 (--serial->shared_int->use_count == 0)) {
2229 struct urb *urb;
2230
2231 urb = serial->shared_int->shared_intr_urb;
2232 if (urb)
2233 usb_kill_urb(urb);
2234 }
2235 mutex_unlock(&serial->shared_int->shared_int_lock);
2236 }
2237 tiocmget = serial->tiocmget;
2238 if (tiocmget) {
2239 wake_up_interruptible(&tiocmget->waitq);
2240 usb_kill_urb(tiocmget->urb);
2241 }
2242
2243 return 0;
2244}
2245
2246static void hso_serial_common_free(struct hso_serial *serial)
2247{
2248 int i;
2249
2250 if (serial->parent->dev)
2251 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2252
2253 tty_unregister_device(tty_drv, serial->minor);
2254
2255 for (i = 0; i < serial->num_rx_urbs; i++) {
2256 /* unlink and free RX URB */
2257 usb_free_urb(serial->rx_urb[i]);
2258 /* free the RX buffer */
2259 kfree(serial->rx_data[i]);
2260 }
2261
2262 /* unlink and free TX URB */
2263 usb_free_urb(serial->tx_urb);
2264 kfree(serial->tx_data);
2265 tty_port_destroy(&serial->port);
2266}
2267
2268static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2269 int rx_size, int tx_size)
2270{
2271 struct device *dev;
2272 int minor;
2273 int i;
2274
2275 tty_port_init(&serial->port);
2276
2277 minor = get_free_serial_index();
2278 if (minor < 0)
2279 goto exit;
2280
2281 /* register our minor number */
2282 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2283 minor, &serial->parent->interface->dev);
2284 dev = serial->parent->dev;
2285 dev_set_drvdata(dev, serial->parent);
2286 i = device_create_file(dev, &dev_attr_hsotype);
2287
2288 /* fill in specific data for later use */
2289 serial->minor = minor;
2290 serial->magic = HSO_SERIAL_MAGIC;
2291 spin_lock_init(&serial->serial_lock);
2292 serial->num_rx_urbs = num_urbs;
2293
2294 /* RX, allocate urb and initialize */
2295
2296 /* prepare our RX buffer */
2297 serial->rx_data_length = rx_size;
2298 for (i = 0; i < serial->num_rx_urbs; i++) {
2299 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2300 if (!serial->rx_urb[i]) {
2301 dev_err(dev, "Could not allocate urb?\n");
2302 goto exit;
2303 }
2304 serial->rx_urb[i]->transfer_buffer = NULL;
2305 serial->rx_urb[i]->transfer_buffer_length = 0;
2306 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2307 GFP_KERNEL);
2308 if (!serial->rx_data[i])
2309 goto exit;
2310 }
2311
2312 /* TX, allocate urb and initialize */
2313 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2314 if (!serial->tx_urb) {
2315 dev_err(dev, "Could not allocate urb?\n");
2316 goto exit;
2317 }
2318 serial->tx_urb->transfer_buffer = NULL;
2319 serial->tx_urb->transfer_buffer_length = 0;
2320 /* prepare our TX buffer */
2321 serial->tx_data_count = 0;
2322 serial->tx_buffer_count = 0;
2323 serial->tx_data_length = tx_size;
2324 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2325 if (!serial->tx_data)
2326 goto exit;
2327
2328 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2329 if (!serial->tx_buffer)
2330 goto exit;
2331
2332 return 0;
2333exit:
2334 hso_serial_common_free(serial);
2335 return -1;
2336}
2337
2338/* Creates a general hso device */
2339static struct hso_device *hso_create_device(struct usb_interface *intf,
2340 int port_spec)
2341{
2342 struct hso_device *hso_dev;
2343
2344 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2345 if (!hso_dev)
2346 return NULL;
2347
2348 hso_dev->port_spec = port_spec;
2349 hso_dev->usb = interface_to_usbdev(intf);
2350 hso_dev->interface = intf;
2351 kref_init(&hso_dev->ref);
2352 mutex_init(&hso_dev->mutex);
2353
2354 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2355 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2356 INIT_WORK(&hso_dev->reset_device, reset_device);
2357
2358 return hso_dev;
2359}
2360
2361/* Removes a network device in the network device table */
2362static int remove_net_device(struct hso_device *hso_dev)
2363{
2364 int i;
2365
2366 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2367 if (network_table[i] == hso_dev) {
2368 network_table[i] = NULL;
2369 break;
2370 }
2371 }
2372 if (i == HSO_MAX_NET_DEVICES)
2373 return -1;
2374 return 0;
2375}
2376
2377/* Frees our network device */
2378static void hso_free_net_device(struct hso_device *hso_dev)
2379{
2380 int i;
2381 struct hso_net *hso_net = dev2net(hso_dev);
2382
2383 if (!hso_net)
2384 return;
2385
2386 remove_net_device(hso_net->parent);
2387
2388 if (hso_net->net)
2389 unregister_netdev(hso_net->net);
2390
2391 /* start freeing */
2392 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2393 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2394 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2395 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2396 }
2397 usb_free_urb(hso_net->mux_bulk_tx_urb);
2398 kfree(hso_net->mux_bulk_tx_buf);
2399 hso_net->mux_bulk_tx_buf = NULL;
2400
2401 if (hso_net->net)
2402 free_netdev(hso_net->net);
2403
2404 kfree(hso_dev);
2405}
2406
2407static const struct net_device_ops hso_netdev_ops = {
2408 .ndo_open = hso_net_open,
2409 .ndo_stop = hso_net_close,
2410 .ndo_start_xmit = hso_net_start_xmit,
2411 .ndo_tx_timeout = hso_net_tx_timeout,
2412};
2413
2414/* initialize the network interface */
2415static void hso_net_init(struct net_device *net)
2416{
2417 struct hso_net *hso_net = netdev_priv(net);
2418
2419 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2420
2421 /* fill in the other fields */
2422 net->netdev_ops = &hso_netdev_ops;
2423 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2424 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2425 net->type = ARPHRD_NONE;
2426 net->mtu = DEFAULT_MTU - 14;
2427 net->tx_queue_len = 10;
2428 SET_ETHTOOL_OPS(net, &ops);
2429
2430 /* and initialize the semaphore */
2431 spin_lock_init(&hso_net->net_lock);
2432}
2433
2434/* Adds a network device in the network device table */
2435static int add_net_device(struct hso_device *hso_dev)
2436{
2437 int i;
2438
2439 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2440 if (network_table[i] == NULL) {
2441 network_table[i] = hso_dev;
2442 break;
2443 }
2444 }
2445 if (i == HSO_MAX_NET_DEVICES)
2446 return -1;
2447 return 0;
2448}
2449
2450static int hso_rfkill_set_block(void *data, bool blocked)
2451{
2452 struct hso_device *hso_dev = data;
2453 int enabled = !blocked;
2454 int rv;
2455
2456 mutex_lock(&hso_dev->mutex);
2457 if (hso_dev->usb_gone)
2458 rv = 0;
2459 else
2460 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2461 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2462 USB_CTRL_SET_TIMEOUT);
2463 mutex_unlock(&hso_dev->mutex);
2464 return rv;
2465}
2466
2467static const struct rfkill_ops hso_rfkill_ops = {
2468 .set_block = hso_rfkill_set_block,
2469};
2470
2471/* Creates and sets up everything for rfkill */
2472static void hso_create_rfkill(struct hso_device *hso_dev,
2473 struct usb_interface *interface)
2474{
2475 struct hso_net *hso_net = dev2net(hso_dev);
2476 struct device *dev = &hso_net->net->dev;
2477 char *rfkn;
2478
2479 rfkn = kzalloc(20, GFP_KERNEL);
2480 if (!rfkn)
2481 dev_err(dev, "%s - Out of memory\n", __func__);
2482
2483 snprintf(rfkn, 20, "hso-%d",
2484 interface->altsetting->desc.bInterfaceNumber);
2485
2486 hso_net->rfkill = rfkill_alloc(rfkn,
2487 &interface_to_usbdev(interface)->dev,
2488 RFKILL_TYPE_WWAN,
2489 &hso_rfkill_ops, hso_dev);
2490 if (!hso_net->rfkill) {
2491 dev_err(dev, "%s - Out of memory\n", __func__);
2492 kfree(rfkn);
2493 return;
2494 }
2495 if (rfkill_register(hso_net->rfkill) < 0) {
2496 rfkill_destroy(hso_net->rfkill);
2497 kfree(rfkn);
2498 hso_net->rfkill = NULL;
2499 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2500 return;
2501 }
2502}
2503
2504static struct device_type hso_type = {
2505 .name = "wwan",
2506};
2507
2508/* Creates our network device */
2509static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2510 int port_spec)
2511{
2512 int result, i;
2513 struct net_device *net;
2514 struct hso_net *hso_net;
2515 struct hso_device *hso_dev;
2516
2517 hso_dev = hso_create_device(interface, port_spec);
2518 if (!hso_dev)
2519 return NULL;
2520
2521 /* allocate our network device, then we can put in our private data */
2522 /* call hso_net_init to do the basic initialization */
2523 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2524 if (!net) {
2525 dev_err(&interface->dev, "Unable to create ethernet device\n");
2526 goto exit;
2527 }
2528
2529 hso_net = netdev_priv(net);
2530
2531 hso_dev->port_data.dev_net = hso_net;
2532 hso_net->net = net;
2533 hso_net->parent = hso_dev;
2534
2535 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2536 USB_DIR_IN);
2537 if (!hso_net->in_endp) {
2538 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2539 goto exit;
2540 }
2541 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2542 USB_DIR_OUT);
2543 if (!hso_net->out_endp) {
2544 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2545 goto exit;
2546 }
2547 SET_NETDEV_DEV(net, &interface->dev);
2548 SET_NETDEV_DEVTYPE(net, &hso_type);
2549
2550 /* registering our net device */
2551 result = register_netdev(net);
2552 if (result) {
2553 dev_err(&interface->dev, "Failed to register device\n");
2554 goto exit;
2555 }
2556
2557 /* start allocating */
2558 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2559 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2560 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2561 dev_err(&interface->dev, "Could not allocate rx urb\n");
2562 goto exit;
2563 }
2564 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2565 GFP_KERNEL);
2566 if (!hso_net->mux_bulk_rx_buf_pool[i])
2567 goto exit;
2568 }
2569 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2570 if (!hso_net->mux_bulk_tx_urb) {
2571 dev_err(&interface->dev, "Could not allocate tx urb\n");
2572 goto exit;
2573 }
2574 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2575 if (!hso_net->mux_bulk_tx_buf)
2576 goto exit;
2577
2578 add_net_device(hso_dev);
2579
2580 hso_log_port(hso_dev);
2581
2582 hso_create_rfkill(hso_dev, interface);
2583
2584 return hso_dev;
2585exit:
2586 hso_free_net_device(hso_dev);
2587 return NULL;
2588}
2589
2590static void hso_free_tiomget(struct hso_serial *serial)
2591{
2592 struct hso_tiocmget *tiocmget;
2593 if (!serial)
2594 return;
2595 tiocmget = serial->tiocmget;
2596 if (tiocmget) {
2597 usb_free_urb(tiocmget->urb);
2598 tiocmget->urb = NULL;
2599 serial->tiocmget = NULL;
2600 kfree(tiocmget);
2601 }
2602}
2603
2604/* Frees an AT channel ( goes for both mux and non-mux ) */
2605static void hso_free_serial_device(struct hso_device *hso_dev)
2606{
2607 struct hso_serial *serial = dev2ser(hso_dev);
2608
2609 if (!serial)
2610 return;
2611 set_serial_by_index(serial->minor, NULL);
2612
2613 hso_serial_common_free(serial);
2614
2615 if (serial->shared_int) {
2616 mutex_lock(&serial->shared_int->shared_int_lock);
2617 if (--serial->shared_int->ref_count == 0)
2618 hso_free_shared_int(serial->shared_int);
2619 else
2620 mutex_unlock(&serial->shared_int->shared_int_lock);
2621 }
2622 hso_free_tiomget(serial);
2623 kfree(serial);
2624 kfree(hso_dev);
2625}
2626
2627/* Creates a bulk AT channel */
2628static struct hso_device *hso_create_bulk_serial_device(
2629 struct usb_interface *interface, int port)
2630{
2631 struct hso_device *hso_dev;
2632 struct hso_serial *serial;
2633 int num_urbs;
2634 struct hso_tiocmget *tiocmget;
2635
2636 hso_dev = hso_create_device(interface, port);
2637 if (!hso_dev)
2638 return NULL;
2639
2640 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2641 if (!serial)
2642 goto exit;
2643
2644 serial->parent = hso_dev;
2645 hso_dev->port_data.dev_serial = serial;
2646
2647 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2648 num_urbs = 2;
2649 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2650 GFP_KERNEL);
2651 /* it isn't going to break our heart if serial->tiocmget
2652 * allocation fails don't bother checking this.
2653 */
2654 if (serial->tiocmget) {
2655 tiocmget = serial->tiocmget;
2656 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2657 if (tiocmget->urb) {
2658 mutex_init(&tiocmget->mutex);
2659 init_waitqueue_head(&tiocmget->waitq);
2660 tiocmget->endp = hso_get_ep(
2661 interface,
2662 USB_ENDPOINT_XFER_INT,
2663 USB_DIR_IN);
2664 } else
2665 hso_free_tiomget(serial);
2666 }
2667 }
2668 else
2669 num_urbs = 1;
2670
2671 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2672 BULK_URB_TX_SIZE))
2673 goto exit;
2674
2675 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2676 USB_DIR_IN);
2677 if (!serial->in_endp) {
2678 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2679 goto exit2;
2680 }
2681
2682 if (!
2683 (serial->out_endp =
2684 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2685 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2686 goto exit2;
2687 }
2688
2689 serial->write_data = hso_std_serial_write_data;
2690
2691 /* and record this serial */
2692 set_serial_by_index(serial->minor, serial);
2693
2694 /* setup the proc dirs and files if needed */
2695 hso_log_port(hso_dev);
2696
2697 /* done, return it */
2698 return hso_dev;
2699
2700exit2:
2701 hso_serial_common_free(serial);
2702exit:
2703 hso_free_tiomget(serial);
2704 kfree(serial);
2705 kfree(hso_dev);
2706 return NULL;
2707}
2708
2709/* Creates a multiplexed AT channel */
2710static
2711struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2712 int port,
2713 struct hso_shared_int *mux)
2714{
2715 struct hso_device *hso_dev;
2716 struct hso_serial *serial;
2717 int port_spec;
2718
2719 port_spec = HSO_INTF_MUX;
2720 port_spec &= ~HSO_PORT_MASK;
2721
2722 port_spec |= hso_mux_to_port(port);
2723 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2724 return NULL;
2725
2726 hso_dev = hso_create_device(interface, port_spec);
2727 if (!hso_dev)
2728 return NULL;
2729
2730 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2731 if (!serial)
2732 goto exit;
2733
2734 hso_dev->port_data.dev_serial = serial;
2735 serial->parent = hso_dev;
2736
2737 if (hso_serial_common_create
2738 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2739 goto exit;
2740
2741 serial->tx_data_length--;
2742 serial->write_data = hso_mux_serial_write_data;
2743
2744 serial->shared_int = mux;
2745 mutex_lock(&serial->shared_int->shared_int_lock);
2746 serial->shared_int->ref_count++;
2747 mutex_unlock(&serial->shared_int->shared_int_lock);
2748
2749 /* and record this serial */
2750 set_serial_by_index(serial->minor, serial);
2751
2752 /* setup the proc dirs and files if needed */
2753 hso_log_port(hso_dev);
2754
2755 /* done, return it */
2756 return hso_dev;
2757
2758exit:
2759 if (serial) {
2760 tty_unregister_device(tty_drv, serial->minor);
2761 kfree(serial);
2762 }
2763 if (hso_dev)
2764 kfree(hso_dev);
2765 return NULL;
2766
2767}
2768
2769static void hso_free_shared_int(struct hso_shared_int *mux)
2770{
2771 usb_free_urb(mux->shared_intr_urb);
2772 kfree(mux->shared_intr_buf);
2773 mutex_unlock(&mux->shared_int_lock);
2774 kfree(mux);
2775}
2776
2777static
2778struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2779{
2780 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2781
2782 if (!mux)
2783 return NULL;
2784
2785 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2786 USB_DIR_IN);
2787 if (!mux->intr_endp) {
2788 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2789 goto exit;
2790 }
2791
2792 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2793 if (!mux->shared_intr_urb) {
2794 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2795 goto exit;
2796 }
2797 mux->shared_intr_buf =
2798 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2799 GFP_KERNEL);
2800 if (!mux->shared_intr_buf)
2801 goto exit;
2802
2803 mutex_init(&mux->shared_int_lock);
2804
2805 return mux;
2806
2807exit:
2808 kfree(mux->shared_intr_buf);
2809 usb_free_urb(mux->shared_intr_urb);
2810 kfree(mux);
2811 return NULL;
2812}
2813
2814/* Gets the port spec for a certain interface */
2815static int hso_get_config_data(struct usb_interface *interface)
2816{
2817 struct usb_device *usbdev = interface_to_usbdev(interface);
2818 u8 *config_data = kmalloc(17, GFP_KERNEL);
2819 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2820 s32 result;
2821
2822 if (!config_data)
2823 return -ENOMEM;
2824 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2825 0x86, 0xC0, 0, 0, config_data, 17,
2826 USB_CTRL_SET_TIMEOUT) != 0x11) {
2827 kfree(config_data);
2828 return -EIO;
2829 }
2830
2831 switch (config_data[if_num]) {
2832 case 0x0:
2833 result = 0;
2834 break;
2835 case 0x1:
2836 result = HSO_PORT_DIAG;
2837 break;
2838 case 0x2:
2839 result = HSO_PORT_GPS;
2840 break;
2841 case 0x3:
2842 result = HSO_PORT_GPS_CONTROL;
2843 break;
2844 case 0x4:
2845 result = HSO_PORT_APP;
2846 break;
2847 case 0x5:
2848 result = HSO_PORT_APP2;
2849 break;
2850 case 0x6:
2851 result = HSO_PORT_CONTROL;
2852 break;
2853 case 0x7:
2854 result = HSO_PORT_NETWORK;
2855 break;
2856 case 0x8:
2857 result = HSO_PORT_MODEM;
2858 break;
2859 case 0x9:
2860 result = HSO_PORT_MSD;
2861 break;
2862 case 0xa:
2863 result = HSO_PORT_PCSC;
2864 break;
2865 case 0xb:
2866 result = HSO_PORT_VOICE;
2867 break;
2868 default:
2869 result = 0;
2870 }
2871
2872 if (result)
2873 result |= HSO_INTF_BULK;
2874
2875 if (config_data[16] & 0x1)
2876 result |= HSO_INFO_CRC_BUG;
2877
2878 kfree(config_data);
2879 return result;
2880}
2881
2882/* called once for each interface upon device insertion */
2883static int hso_probe(struct usb_interface *interface,
2884 const struct usb_device_id *id)
2885{
2886 int mux, i, if_num, port_spec;
2887 unsigned char port_mask;
2888 struct hso_device *hso_dev = NULL;
2889 struct hso_shared_int *shared_int;
2890 struct hso_device *tmp_dev = NULL;
2891
2892 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2893 dev_err(&interface->dev, "Not our interface\n");
2894 return -ENODEV;
2895 }
2896
2897 if_num = interface->altsetting->desc.bInterfaceNumber;
2898
2899 /* Get the interface/port specification from either driver_info or from
2900 * the device itself */
2901 if (id->driver_info)
2902 port_spec = ((u32 *)(id->driver_info))[if_num];
2903 else
2904 port_spec = hso_get_config_data(interface);
2905
2906 /* Check if we need to switch to alt interfaces prior to port
2907 * configuration */
2908 if (interface->num_altsetting > 1)
2909 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2910 interface->needs_remote_wakeup = 1;
2911
2912 /* Allocate new hso device(s) */
2913 switch (port_spec & HSO_INTF_MASK) {
2914 case HSO_INTF_MUX:
2915 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2916 /* Create the network device */
2917 if (!disable_net) {
2918 hso_dev = hso_create_net_device(interface,
2919 port_spec);
2920 if (!hso_dev)
2921 goto exit;
2922 tmp_dev = hso_dev;
2923 }
2924 }
2925
2926 if (hso_get_mux_ports(interface, &port_mask))
2927 /* TODO: de-allocate everything */
2928 goto exit;
2929
2930 shared_int = hso_create_shared_int(interface);
2931 if (!shared_int)
2932 goto exit;
2933
2934 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2935 if (port_mask & i) {
2936 hso_dev = hso_create_mux_serial_device(
2937 interface, i, shared_int);
2938 if (!hso_dev)
2939 goto exit;
2940 }
2941 }
2942
2943 if (tmp_dev)
2944 hso_dev = tmp_dev;
2945 break;
2946
2947 case HSO_INTF_BULK:
2948 /* It's a regular bulk interface */
2949 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2950 if (!disable_net)
2951 hso_dev =
2952 hso_create_net_device(interface, port_spec);
2953 } else {
2954 hso_dev =
2955 hso_create_bulk_serial_device(interface, port_spec);
2956 }
2957 if (!hso_dev)
2958 goto exit;
2959 break;
2960 default:
2961 goto exit;
2962 }
2963
2964 /* save our data pointer in this device */
2965 usb_set_intfdata(interface, hso_dev);
2966
2967 /* done */
2968 return 0;
2969exit:
2970 hso_free_interface(interface);
2971 return -ENODEV;
2972}
2973
2974/* device removed, cleaning up */
2975static void hso_disconnect(struct usb_interface *interface)
2976{
2977 hso_free_interface(interface);
2978
2979 /* remove reference of our private data */
2980 usb_set_intfdata(interface, NULL);
2981}
2982
2983static void async_get_intf(struct work_struct *data)
2984{
2985 struct hso_device *hso_dev =
2986 container_of(data, struct hso_device, async_get_intf);
2987 usb_autopm_get_interface(hso_dev->interface);
2988}
2989
2990static void async_put_intf(struct work_struct *data)
2991{
2992 struct hso_device *hso_dev =
2993 container_of(data, struct hso_device, async_put_intf);
2994 usb_autopm_put_interface(hso_dev->interface);
2995}
2996
2997static int hso_get_activity(struct hso_device *hso_dev)
2998{
2999 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3000 if (!hso_dev->is_active) {
3001 hso_dev->is_active = 1;
3002 schedule_work(&hso_dev->async_get_intf);
3003 }
3004 }
3005
3006 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3007 return -EAGAIN;
3008
3009 usb_mark_last_busy(hso_dev->usb);
3010
3011 return 0;
3012}
3013
3014static int hso_put_activity(struct hso_device *hso_dev)
3015{
3016 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3017 if (hso_dev->is_active) {
3018 hso_dev->is_active = 0;
3019 schedule_work(&hso_dev->async_put_intf);
3020 return -EAGAIN;
3021 }
3022 }
3023 hso_dev->is_active = 0;
3024 return 0;
3025}
3026
3027/* called by kernel when we need to suspend device */
3028static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3029{
3030 int i, result;
3031
3032 /* Stop all serial ports */
3033 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3034 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3035 result = hso_stop_serial_device(serial_table[i]);
3036 if (result)
3037 goto out;
3038 }
3039 }
3040
3041 /* Stop all network ports */
3042 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3043 if (network_table[i] &&
3044 (network_table[i]->interface == iface)) {
3045 result = hso_stop_net_device(network_table[i]);
3046 if (result)
3047 goto out;
3048 }
3049 }
3050
3051out:
3052 return 0;
3053}
3054
3055/* called by kernel when we need to resume device */
3056static int hso_resume(struct usb_interface *iface)
3057{
3058 int i, result = 0;
3059 struct hso_net *hso_net;
3060
3061 /* Start all serial ports */
3062 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3063 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3064 if (dev2ser(serial_table[i])->port.count) {
3065 result =
3066 hso_start_serial_device(serial_table[i], GFP_NOIO);
3067 hso_kick_transmit(dev2ser(serial_table[i]));
3068 if (result)
3069 goto out;
3070 }
3071 }
3072 }
3073
3074 /* Start all network ports */
3075 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3076 if (network_table[i] &&
3077 (network_table[i]->interface == iface)) {
3078 hso_net = dev2net(network_table[i]);
3079 if (hso_net->flags & IFF_UP) {
3080 /* First transmit any lingering data,
3081 then restart the device. */
3082 if (hso_net->skb_tx_buf) {
3083 dev_dbg(&iface->dev,
3084 "Transmitting"
3085 " lingering data\n");
3086 hso_net_start_xmit(hso_net->skb_tx_buf,
3087 hso_net->net);
3088 hso_net->skb_tx_buf = NULL;
3089 }
3090 result = hso_start_net_device(network_table[i]);
3091 if (result)
3092 goto out;
3093 }
3094 }
3095 }
3096
3097out:
3098 return result;
3099}
3100
3101static void reset_device(struct work_struct *data)
3102{
3103 struct hso_device *hso_dev =
3104 container_of(data, struct hso_device, reset_device);
3105 struct usb_device *usb = hso_dev->usb;
3106 int result;
3107
3108 if (hso_dev->usb_gone) {
3109 D1("No reset during disconnect\n");
3110 } else {
3111 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3112 if (result < 0)
3113 D1("unable to lock device for reset: %d\n", result);
3114 else {
3115 usb_reset_device(usb);
3116 usb_unlock_device(usb);
3117 }
3118 }
3119}
3120
3121static void hso_serial_ref_free(struct kref *ref)
3122{
3123 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3124
3125 hso_free_serial_device(hso_dev);
3126}
3127
3128static void hso_free_interface(struct usb_interface *interface)
3129{
3130 struct hso_serial *hso_dev;
3131 int i;
3132
3133 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3134 if (serial_table[i] &&
3135 (serial_table[i]->interface == interface)) {
3136 hso_dev = dev2ser(serial_table[i]);
3137 tty_port_tty_hangup(&hso_dev->port, false);
3138 mutex_lock(&hso_dev->parent->mutex);
3139 hso_dev->parent->usb_gone = 1;
3140 mutex_unlock(&hso_dev->parent->mutex);
3141 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3142 }
3143 }
3144
3145 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3146 if (network_table[i] &&
3147 (network_table[i]->interface == interface)) {
3148 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3149 /* hso_stop_net_device doesn't stop the net queue since
3150 * traffic needs to start it again when suspended */
3151 netif_stop_queue(dev2net(network_table[i])->net);
3152 hso_stop_net_device(network_table[i]);
3153 cancel_work_sync(&network_table[i]->async_put_intf);
3154 cancel_work_sync(&network_table[i]->async_get_intf);
3155 if (rfk) {
3156 rfkill_unregister(rfk);
3157 rfkill_destroy(rfk);
3158 }
3159 hso_free_net_device(network_table[i]);
3160 }
3161 }
3162}
3163
3164/* Helper functions */
3165
3166/* Get the endpoint ! */
3167static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3168 int type, int dir)
3169{
3170 int i;
3171 struct usb_host_interface *iface = intf->cur_altsetting;
3172 struct usb_endpoint_descriptor *endp;
3173
3174 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3175 endp = &iface->endpoint[i].desc;
3176 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3177 (usb_endpoint_type(endp) == type))
3178 return endp;
3179 }
3180
3181 return NULL;
3182}
3183
3184/* Get the byte that describes which ports are enabled */
3185static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3186{
3187 int i;
3188 struct usb_host_interface *iface = intf->cur_altsetting;
3189
3190 if (iface->extralen == 3) {
3191 *ports = iface->extra[2];
3192 return 0;
3193 }
3194
3195 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3196 if (iface->endpoint[i].extralen == 3) {
3197 *ports = iface->endpoint[i].extra[2];
3198 return 0;
3199 }
3200 }
3201
3202 return -1;
3203}
3204
3205/* interrupt urb needs to be submitted, used for serial read of muxed port */
3206static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3207 struct usb_device *usb, gfp_t gfp)
3208{
3209 int result;
3210
3211 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3212 usb_rcvintpipe(usb,
3213 shared_int->intr_endp->bEndpointAddress & 0x7F),
3214 shared_int->shared_intr_buf,
3215 1,
3216 intr_callback, shared_int,
3217 shared_int->intr_endp->bInterval);
3218
3219 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3220 if (result)
3221 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3222 result);
3223
3224 return result;
3225}
3226
3227/* operations setup of the serial interface */
3228static const struct tty_operations hso_serial_ops = {
3229 .open = hso_serial_open,
3230 .close = hso_serial_close,
3231 .write = hso_serial_write,
3232 .write_room = hso_serial_write_room,
3233 .ioctl = hso_serial_ioctl,
3234 .set_termios = hso_serial_set_termios,
3235 .chars_in_buffer = hso_serial_chars_in_buffer,
3236 .tiocmget = hso_serial_tiocmget,
3237 .tiocmset = hso_serial_tiocmset,
3238 .get_icount = hso_get_count,
3239 .unthrottle = hso_unthrottle
3240};
3241
3242static struct usb_driver hso_driver = {
3243 .name = driver_name,
3244 .probe = hso_probe,
3245 .disconnect = hso_disconnect,
3246 .id_table = hso_ids,
3247 .suspend = hso_suspend,
3248 .resume = hso_resume,
3249 .reset_resume = hso_resume,
3250 .supports_autosuspend = 1,
3251 .disable_hub_initiated_lpm = 1,
3252};
3253
3254static int __init hso_init(void)
3255{
3256 int i;
3257 int result;
3258
3259 /* put it in the log */
3260 printk(KERN_INFO "hso: %s\n", version);
3261
3262 /* Initialise the serial table semaphore and table */
3263 spin_lock_init(&serial_table_lock);
3264 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3265 serial_table[i] = NULL;
3266
3267 /* allocate our driver using the proper amount of supported minors */
3268 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3269 if (!tty_drv)
3270 return -ENOMEM;
3271
3272 /* fill in all needed values */
3273 tty_drv->driver_name = driver_name;
3274 tty_drv->name = tty_filename;
3275
3276 /* if major number is provided as parameter, use that one */
3277 if (tty_major)
3278 tty_drv->major = tty_major;
3279
3280 tty_drv->minor_start = 0;
3281 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3282 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3283 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3284 tty_drv->init_termios = tty_std_termios;
3285 hso_init_termios(&tty_drv->init_termios);
3286 tty_set_operations(tty_drv, &hso_serial_ops);
3287
3288 /* register the tty driver */
3289 result = tty_register_driver(tty_drv);
3290 if (result) {
3291 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3292 __func__, result);
3293 goto err_free_tty;
3294 }
3295
3296 /* register this module as an usb driver */
3297 result = usb_register(&hso_driver);
3298 if (result) {
3299 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3300 result);
3301 goto err_unreg_tty;
3302 }
3303
3304 /* done */
3305 return 0;
3306err_unreg_tty:
3307 tty_unregister_driver(tty_drv);
3308err_free_tty:
3309 put_tty_driver(tty_drv);
3310 return result;
3311}
3312
3313static void __exit hso_exit(void)
3314{
3315 printk(KERN_INFO "hso: unloaded\n");
3316
3317 tty_unregister_driver(tty_drv);
3318 put_tty_driver(tty_drv);
3319 /* deregister the usb driver */
3320 usb_deregister(&hso_driver);
3321}
3322
3323/* Module definitions */
3324module_init(hso_init);
3325module_exit(hso_exit);
3326
3327MODULE_AUTHOR(MOD_AUTHOR);
3328MODULE_DESCRIPTION(MOD_DESCRIPTION);
3329MODULE_LICENSE(MOD_LICENSE);
3330
3331/* change the debug level (eg: insmod hso.ko debug=0x04) */
3332MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3333module_param(debug, int, S_IRUGO | S_IWUSR);
3334
3335/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3336MODULE_PARM_DESC(tty_major, "Set the major tty number");
3337module_param(tty_major, int, S_IRUGO | S_IWUSR);
3338
3339/* disable network interface (eg: insmod hso.ko disable_net=1) */
3340MODULE_PARM_DESC(disable_net, "Disable the network interface");
3341module_param(disable_net, int, S_IRUGO | S_IWUSR);
1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Driver for Option High Speed Mobile Devices.
5 *
6 * Copyright (C) 2008 Option International
7 * Filip Aben <f.aben@option.com>
8 * Denis Joseph Barrow <d.barow@option.com>
9 * Jan Dumon <j.dumon@option.com>
10 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
11 * <ajb@spheresystems.co.uk>
12 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
13 * Copyright (C) 2008 Novell, Inc.
14 *
15 *****************************************************************************/
16
17/******************************************************************************
18 *
19 * Description of the device:
20 *
21 * Interface 0: Contains the IP network interface on the bulk end points.
22 * The multiplexed serial ports are using the interrupt and
23 * control endpoints.
24 * Interrupt contains a bitmap telling which multiplexed
25 * serialport needs servicing.
26 *
27 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
28 * port is opened, as this have a huge impact on the network port
29 * throughput.
30 *
31 * Interface 2: Standard modem interface - circuit switched interface, this
32 * can be used to make a standard ppp connection however it
33 * should not be used in conjunction with the IP network interface
34 * enabled for USB performance reasons i.e. if using this set
35 * ideally disable_net=1.
36 *
37 *****************************************************************************/
38
39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
41#include <linux/sched/signal.h>
42#include <linux/slab.h>
43#include <linux/init.h>
44#include <linux/delay.h>
45#include <linux/netdevice.h>
46#include <linux/module.h>
47#include <linux/ethtool.h>
48#include <linux/usb.h>
49#include <linux/tty.h>
50#include <linux/tty_driver.h>
51#include <linux/tty_flip.h>
52#include <linux/kmod.h>
53#include <linux/rfkill.h>
54#include <linux/ip.h>
55#include <linux/uaccess.h>
56#include <linux/usb/cdc.h>
57#include <net/arp.h>
58#include <asm/byteorder.h>
59#include <linux/serial_core.h>
60#include <linux/serial.h>
61
62
63#define MOD_AUTHOR "Option Wireless"
64#define MOD_DESCRIPTION "USB High Speed Option driver"
65
66#define HSO_MAX_NET_DEVICES 10
67#define HSO__MAX_MTU 2048
68#define DEFAULT_MTU 1500
69#define DEFAULT_MRU 1500
70
71#define CTRL_URB_RX_SIZE 1024
72#define CTRL_URB_TX_SIZE 64
73
74#define BULK_URB_RX_SIZE 4096
75#define BULK_URB_TX_SIZE 8192
76
77#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
78#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
79#define MUX_BULK_RX_BUF_COUNT 4
80#define USB_TYPE_OPTION_VENDOR 0x20
81
82/* These definitions are used with the struct hso_net flags element */
83/* - use *_bit operations on it. (bit indices not values.) */
84#define HSO_NET_RUNNING 0
85
86#define HSO_NET_TX_TIMEOUT (HZ*10)
87
88#define HSO_SERIAL_MAGIC 0x48534f31
89
90/* Number of ttys to handle */
91#define HSO_SERIAL_TTY_MINORS 256
92
93#define MAX_RX_URBS 2
94
95/*****************************************************************************/
96/* Debugging functions */
97/*****************************************************************************/
98#define hso_dbg(lvl, fmt, ...) \
99do { \
100 if ((lvl) & debug) \
101 pr_info("[%d:%s] " fmt, \
102 __LINE__, __func__, ##__VA_ARGS__); \
103} while (0)
104
105/*****************************************************************************/
106/* Enumerators */
107/*****************************************************************************/
108enum pkt_parse_state {
109 WAIT_IP,
110 WAIT_DATA,
111 WAIT_SYNC
112};
113
114/*****************************************************************************/
115/* Structs */
116/*****************************************************************************/
117
118struct hso_shared_int {
119 struct usb_endpoint_descriptor *intr_endp;
120 void *shared_intr_buf;
121 struct urb *shared_intr_urb;
122 struct usb_device *usb;
123 int use_count;
124 int ref_count;
125 struct mutex shared_int_lock;
126};
127
128struct hso_net {
129 struct hso_device *parent;
130 struct net_device *net;
131 struct rfkill *rfkill;
132 char name[24];
133
134 struct usb_endpoint_descriptor *in_endp;
135 struct usb_endpoint_descriptor *out_endp;
136
137 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
138 struct urb *mux_bulk_tx_urb;
139 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
140 void *mux_bulk_tx_buf;
141
142 struct sk_buff *skb_rx_buf;
143 struct sk_buff *skb_tx_buf;
144
145 enum pkt_parse_state rx_parse_state;
146 spinlock_t net_lock;
147
148 unsigned short rx_buf_size;
149 unsigned short rx_buf_missing;
150 struct iphdr rx_ip_hdr;
151
152 unsigned long flags;
153};
154
155enum rx_ctrl_state{
156 RX_IDLE,
157 RX_SENT,
158 RX_PENDING
159};
160
161#define BM_REQUEST_TYPE (0xa1)
162#define B_NOTIFICATION (0x20)
163#define W_VALUE (0x0)
164#define W_LENGTH (0x2)
165
166#define B_OVERRUN (0x1<<6)
167#define B_PARITY (0x1<<5)
168#define B_FRAMING (0x1<<4)
169#define B_RING_SIGNAL (0x1<<3)
170#define B_BREAK (0x1<<2)
171#define B_TX_CARRIER (0x1<<1)
172#define B_RX_CARRIER (0x1<<0)
173
174struct hso_serial_state_notification {
175 u8 bmRequestType;
176 u8 bNotification;
177 u16 wValue;
178 u16 wIndex;
179 u16 wLength;
180 u16 UART_state_bitmap;
181} __packed;
182
183struct hso_tiocmget {
184 struct mutex mutex;
185 wait_queue_head_t waitq;
186 int intr_completed;
187 struct usb_endpoint_descriptor *endp;
188 struct urb *urb;
189 struct hso_serial_state_notification *serial_state_notification;
190 u16 prev_UART_state_bitmap;
191 struct uart_icount icount;
192};
193
194
195struct hso_serial {
196 struct hso_device *parent;
197 int magic;
198 u8 minor;
199
200 struct hso_shared_int *shared_int;
201
202 /* rx/tx urb could be either a bulk urb or a control urb depending
203 on which serial port it is used on. */
204 struct urb *rx_urb[MAX_RX_URBS];
205 u8 num_rx_urbs;
206 u8 *rx_data[MAX_RX_URBS];
207 u16 rx_data_length; /* should contain allocated length */
208
209 struct urb *tx_urb;
210 u8 *tx_data;
211 u8 *tx_buffer;
212 u16 tx_data_length; /* should contain allocated length */
213 u16 tx_data_count;
214 u16 tx_buffer_count;
215 struct usb_ctrlrequest ctrl_req_tx;
216 struct usb_ctrlrequest ctrl_req_rx;
217
218 struct usb_endpoint_descriptor *in_endp;
219 struct usb_endpoint_descriptor *out_endp;
220
221 enum rx_ctrl_state rx_state;
222 u8 rts_state;
223 u8 dtr_state;
224 unsigned tx_urb_used:1;
225
226 struct tty_port port;
227 /* from usb_serial_port */
228 spinlock_t serial_lock;
229
230 int (*write_data) (struct hso_serial *serial);
231 struct hso_tiocmget *tiocmget;
232 /* Hacks required to get flow control
233 * working on the serial receive buffers
234 * so as not to drop characters on the floor.
235 */
236 int curr_rx_urb_idx;
237 u8 rx_urb_filled[MAX_RX_URBS];
238 struct tasklet_struct unthrottle_tasklet;
239};
240
241struct hso_device {
242 union {
243 struct hso_serial *dev_serial;
244 struct hso_net *dev_net;
245 } port_data;
246
247 u32 port_spec;
248
249 u8 is_active;
250 u8 usb_gone;
251 struct work_struct async_get_intf;
252 struct work_struct async_put_intf;
253
254 struct usb_device *usb;
255 struct usb_interface *interface;
256
257 struct device *dev;
258 struct kref ref;
259 struct mutex mutex;
260};
261
262/* Type of interface */
263#define HSO_INTF_MASK 0xFF00
264#define HSO_INTF_MUX 0x0100
265#define HSO_INTF_BULK 0x0200
266
267/* Type of port */
268#define HSO_PORT_MASK 0xFF
269#define HSO_PORT_NO_PORT 0x0
270#define HSO_PORT_CONTROL 0x1
271#define HSO_PORT_APP 0x2
272#define HSO_PORT_GPS 0x3
273#define HSO_PORT_PCSC 0x4
274#define HSO_PORT_APP2 0x5
275#define HSO_PORT_GPS_CONTROL 0x6
276#define HSO_PORT_MSD 0x7
277#define HSO_PORT_VOICE 0x8
278#define HSO_PORT_DIAG2 0x9
279#define HSO_PORT_DIAG 0x10
280#define HSO_PORT_MODEM 0x11
281#define HSO_PORT_NETWORK 0x12
282
283/* Additional device info */
284#define HSO_INFO_MASK 0xFF000000
285#define HSO_INFO_CRC_BUG 0x01000000
286
287/*****************************************************************************/
288/* Prototypes */
289/*****************************************************************************/
290/* Serial driver functions */
291static int hso_serial_tiocmset(struct tty_struct *tty,
292 unsigned int set, unsigned int clear);
293static void ctrl_callback(struct urb *urb);
294static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
295static void hso_kick_transmit(struct hso_serial *serial);
296/* Helper functions */
297static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
298 struct usb_device *usb, gfp_t gfp);
299static void handle_usb_error(int status, const char *function,
300 struct hso_device *hso_dev);
301static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
302 int type, int dir);
303static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
304static void hso_free_interface(struct usb_interface *intf);
305static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
306static int hso_stop_serial_device(struct hso_device *hso_dev);
307static int hso_start_net_device(struct hso_device *hso_dev);
308static void hso_free_shared_int(struct hso_shared_int *shared_int);
309static int hso_stop_net_device(struct hso_device *hso_dev);
310static void hso_serial_ref_free(struct kref *ref);
311static void hso_std_serial_read_bulk_callback(struct urb *urb);
312static int hso_mux_serial_read(struct hso_serial *serial);
313static void async_get_intf(struct work_struct *data);
314static void async_put_intf(struct work_struct *data);
315static int hso_put_activity(struct hso_device *hso_dev);
316static int hso_get_activity(struct hso_device *hso_dev);
317static void tiocmget_intr_callback(struct urb *urb);
318/*****************************************************************************/
319/* Helping functions */
320/*****************************************************************************/
321
322/* #define DEBUG */
323
324static inline struct hso_net *dev2net(struct hso_device *hso_dev)
325{
326 return hso_dev->port_data.dev_net;
327}
328
329static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
330{
331 return hso_dev->port_data.dev_serial;
332}
333
334/* Debugging functions */
335#ifdef DEBUG
336static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
337 unsigned int len)
338{
339 static char name[255];
340
341 sprintf(name, "hso[%d:%s]", line_count, func_name);
342 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
343}
344
345#define DUMP(buf_, len_) \
346 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
347
348#define DUMP1(buf_, len_) \
349 do { \
350 if (0x01 & debug) \
351 DUMP(buf_, len_); \
352 } while (0)
353#else
354#define DUMP(buf_, len_)
355#define DUMP1(buf_, len_)
356#endif
357
358/* module parameters */
359static int debug;
360static int tty_major;
361static int disable_net;
362
363/* driver info */
364static const char driver_name[] = "hso";
365static const char tty_filename[] = "ttyHS";
366static const char *version = __FILE__ ": " MOD_AUTHOR;
367/* the usb driver itself (registered in hso_init) */
368static struct usb_driver hso_driver;
369/* serial structures */
370static struct tty_driver *tty_drv;
371static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
372static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
373static spinlock_t serial_table_lock;
374
375static const s32 default_port_spec[] = {
376 HSO_INTF_MUX | HSO_PORT_NETWORK,
377 HSO_INTF_BULK | HSO_PORT_DIAG,
378 HSO_INTF_BULK | HSO_PORT_MODEM,
379 0
380};
381
382static const s32 icon321_port_spec[] = {
383 HSO_INTF_MUX | HSO_PORT_NETWORK,
384 HSO_INTF_BULK | HSO_PORT_DIAG2,
385 HSO_INTF_BULK | HSO_PORT_MODEM,
386 HSO_INTF_BULK | HSO_PORT_DIAG,
387 0
388};
389
390#define default_port_device(vendor, product) \
391 USB_DEVICE(vendor, product), \
392 .driver_info = (kernel_ulong_t)default_port_spec
393
394#define icon321_port_device(vendor, product) \
395 USB_DEVICE(vendor, product), \
396 .driver_info = (kernel_ulong_t)icon321_port_spec
397
398/* list of devices we support */
399static const struct usb_device_id hso_ids[] = {
400 {default_port_device(0x0af0, 0x6711)},
401 {default_port_device(0x0af0, 0x6731)},
402 {default_port_device(0x0af0, 0x6751)},
403 {default_port_device(0x0af0, 0x6771)},
404 {default_port_device(0x0af0, 0x6791)},
405 {default_port_device(0x0af0, 0x6811)},
406 {default_port_device(0x0af0, 0x6911)},
407 {default_port_device(0x0af0, 0x6951)},
408 {default_port_device(0x0af0, 0x6971)},
409 {default_port_device(0x0af0, 0x7011)},
410 {default_port_device(0x0af0, 0x7031)},
411 {default_port_device(0x0af0, 0x7051)},
412 {default_port_device(0x0af0, 0x7071)},
413 {default_port_device(0x0af0, 0x7111)},
414 {default_port_device(0x0af0, 0x7211)},
415 {default_port_device(0x0af0, 0x7251)},
416 {default_port_device(0x0af0, 0x7271)},
417 {default_port_device(0x0af0, 0x7311)},
418 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
419 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
420 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
421 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
422 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
423 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
424 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
425 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
426 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
427 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
428 {USB_DEVICE(0x0af0, 0x7701)},
429 {USB_DEVICE(0x0af0, 0x7706)},
430 {USB_DEVICE(0x0af0, 0x7801)},
431 {USB_DEVICE(0x0af0, 0x7901)},
432 {USB_DEVICE(0x0af0, 0x7A01)},
433 {USB_DEVICE(0x0af0, 0x7A05)},
434 {USB_DEVICE(0x0af0, 0x8200)},
435 {USB_DEVICE(0x0af0, 0x8201)},
436 {USB_DEVICE(0x0af0, 0x8300)},
437 {USB_DEVICE(0x0af0, 0x8302)},
438 {USB_DEVICE(0x0af0, 0x8304)},
439 {USB_DEVICE(0x0af0, 0x8400)},
440 {USB_DEVICE(0x0af0, 0x8600)},
441 {USB_DEVICE(0x0af0, 0x8800)},
442 {USB_DEVICE(0x0af0, 0x8900)},
443 {USB_DEVICE(0x0af0, 0x9000)},
444 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
445 {USB_DEVICE(0x0af0, 0xd035)},
446 {USB_DEVICE(0x0af0, 0xd055)},
447 {USB_DEVICE(0x0af0, 0xd155)},
448 {USB_DEVICE(0x0af0, 0xd255)},
449 {USB_DEVICE(0x0af0, 0xd057)},
450 {USB_DEVICE(0x0af0, 0xd157)},
451 {USB_DEVICE(0x0af0, 0xd257)},
452 {USB_DEVICE(0x0af0, 0xd357)},
453 {USB_DEVICE(0x0af0, 0xd058)},
454 {USB_DEVICE(0x0af0, 0xc100)},
455 {}
456};
457MODULE_DEVICE_TABLE(usb, hso_ids);
458
459/* Sysfs attribute */
460static ssize_t hso_sysfs_show_porttype(struct device *dev,
461 struct device_attribute *attr,
462 char *buf)
463{
464 struct hso_device *hso_dev = dev_get_drvdata(dev);
465 char *port_name;
466
467 if (!hso_dev)
468 return 0;
469
470 switch (hso_dev->port_spec & HSO_PORT_MASK) {
471 case HSO_PORT_CONTROL:
472 port_name = "Control";
473 break;
474 case HSO_PORT_APP:
475 port_name = "Application";
476 break;
477 case HSO_PORT_APP2:
478 port_name = "Application2";
479 break;
480 case HSO_PORT_GPS:
481 port_name = "GPS";
482 break;
483 case HSO_PORT_GPS_CONTROL:
484 port_name = "GPS Control";
485 break;
486 case HSO_PORT_PCSC:
487 port_name = "PCSC";
488 break;
489 case HSO_PORT_DIAG:
490 port_name = "Diagnostic";
491 break;
492 case HSO_PORT_DIAG2:
493 port_name = "Diagnostic2";
494 break;
495 case HSO_PORT_MODEM:
496 port_name = "Modem";
497 break;
498 case HSO_PORT_NETWORK:
499 port_name = "Network";
500 break;
501 default:
502 port_name = "Unknown";
503 break;
504 }
505
506 return sprintf(buf, "%s\n", port_name);
507}
508static DEVICE_ATTR(hsotype, 0444, hso_sysfs_show_porttype, NULL);
509
510static struct attribute *hso_serial_dev_attrs[] = {
511 &dev_attr_hsotype.attr,
512 NULL
513};
514
515ATTRIBUTE_GROUPS(hso_serial_dev);
516
517static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
518{
519 int idx;
520
521 for (idx = 0; idx < serial->num_rx_urbs; idx++)
522 if (serial->rx_urb[idx] == urb)
523 return idx;
524 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
525 return -1;
526}
527
528/* converts mux value to a port spec value */
529static u32 hso_mux_to_port(int mux)
530{
531 u32 result;
532
533 switch (mux) {
534 case 0x1:
535 result = HSO_PORT_CONTROL;
536 break;
537 case 0x2:
538 result = HSO_PORT_APP;
539 break;
540 case 0x4:
541 result = HSO_PORT_PCSC;
542 break;
543 case 0x8:
544 result = HSO_PORT_GPS;
545 break;
546 case 0x10:
547 result = HSO_PORT_APP2;
548 break;
549 default:
550 result = HSO_PORT_NO_PORT;
551 }
552 return result;
553}
554
555/* converts port spec value to a mux value */
556static u32 hso_port_to_mux(int port)
557{
558 u32 result;
559
560 switch (port & HSO_PORT_MASK) {
561 case HSO_PORT_CONTROL:
562 result = 0x0;
563 break;
564 case HSO_PORT_APP:
565 result = 0x1;
566 break;
567 case HSO_PORT_PCSC:
568 result = 0x2;
569 break;
570 case HSO_PORT_GPS:
571 result = 0x3;
572 break;
573 case HSO_PORT_APP2:
574 result = 0x4;
575 break;
576 default:
577 result = 0x0;
578 }
579 return result;
580}
581
582static struct hso_serial *get_serial_by_shared_int_and_type(
583 struct hso_shared_int *shared_int,
584 int mux)
585{
586 int i, port;
587
588 port = hso_mux_to_port(mux);
589
590 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
591 if (serial_table[i] &&
592 (dev2ser(serial_table[i])->shared_int == shared_int) &&
593 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
594 return dev2ser(serial_table[i]);
595 }
596 }
597
598 return NULL;
599}
600
601static struct hso_serial *get_serial_by_index(unsigned index)
602{
603 struct hso_serial *serial = NULL;
604 unsigned long flags;
605
606 spin_lock_irqsave(&serial_table_lock, flags);
607 if (serial_table[index])
608 serial = dev2ser(serial_table[index]);
609 spin_unlock_irqrestore(&serial_table_lock, flags);
610
611 return serial;
612}
613
614static int get_free_serial_index(void)
615{
616 int index;
617 unsigned long flags;
618
619 spin_lock_irqsave(&serial_table_lock, flags);
620 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
621 if (serial_table[index] == NULL) {
622 spin_unlock_irqrestore(&serial_table_lock, flags);
623 return index;
624 }
625 }
626 spin_unlock_irqrestore(&serial_table_lock, flags);
627
628 pr_err("%s: no free serial devices in table\n", __func__);
629 return -1;
630}
631
632static void set_serial_by_index(unsigned index, struct hso_serial *serial)
633{
634 unsigned long flags;
635
636 spin_lock_irqsave(&serial_table_lock, flags);
637 if (serial)
638 serial_table[index] = serial->parent;
639 else
640 serial_table[index] = NULL;
641 spin_unlock_irqrestore(&serial_table_lock, flags);
642}
643
644static void handle_usb_error(int status, const char *function,
645 struct hso_device *hso_dev)
646{
647 char *explanation;
648
649 switch (status) {
650 case -ENODEV:
651 explanation = "no device";
652 break;
653 case -ENOENT:
654 explanation = "endpoint not enabled";
655 break;
656 case -EPIPE:
657 explanation = "endpoint stalled";
658 break;
659 case -ENOSPC:
660 explanation = "not enough bandwidth";
661 break;
662 case -ESHUTDOWN:
663 explanation = "device disabled";
664 break;
665 case -EHOSTUNREACH:
666 explanation = "device suspended";
667 break;
668 case -EINVAL:
669 case -EAGAIN:
670 case -EFBIG:
671 case -EMSGSIZE:
672 explanation = "internal error";
673 break;
674 case -EILSEQ:
675 case -EPROTO:
676 case -ETIME:
677 case -ETIMEDOUT:
678 explanation = "protocol error";
679 if (hso_dev)
680 usb_queue_reset_device(hso_dev->interface);
681 break;
682 default:
683 explanation = "unknown status";
684 break;
685 }
686
687 /* log a meaningful explanation of an USB status */
688 hso_dbg(0x1, "%s: received USB status - %s (%d)\n",
689 function, explanation, status);
690}
691
692/* Network interface functions */
693
694/* called when net interface is brought up by ifconfig */
695static int hso_net_open(struct net_device *net)
696{
697 struct hso_net *odev = netdev_priv(net);
698 unsigned long flags = 0;
699
700 if (!odev) {
701 dev_err(&net->dev, "No net device !\n");
702 return -ENODEV;
703 }
704
705 odev->skb_tx_buf = NULL;
706
707 /* setup environment */
708 spin_lock_irqsave(&odev->net_lock, flags);
709 odev->rx_parse_state = WAIT_IP;
710 odev->rx_buf_size = 0;
711 odev->rx_buf_missing = sizeof(struct iphdr);
712 spin_unlock_irqrestore(&odev->net_lock, flags);
713
714 /* We are up and running. */
715 set_bit(HSO_NET_RUNNING, &odev->flags);
716 hso_start_net_device(odev->parent);
717
718 /* Tell the kernel we are ready to start receiving from it */
719 netif_start_queue(net);
720
721 return 0;
722}
723
724/* called when interface is brought down by ifconfig */
725static int hso_net_close(struct net_device *net)
726{
727 struct hso_net *odev = netdev_priv(net);
728
729 /* we don't need the queue anymore */
730 netif_stop_queue(net);
731 /* no longer running */
732 clear_bit(HSO_NET_RUNNING, &odev->flags);
733
734 hso_stop_net_device(odev->parent);
735
736 /* done */
737 return 0;
738}
739
740/* USB tells is xmit done, we should start the netqueue again */
741static void write_bulk_callback(struct urb *urb)
742{
743 struct hso_net *odev = urb->context;
744 int status = urb->status;
745
746 /* Sanity check */
747 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
748 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
749 return;
750 }
751
752 /* Do we still have a valid kernel network device? */
753 if (!netif_device_present(odev->net)) {
754 dev_err(&urb->dev->dev, "%s: net device not present\n",
755 __func__);
756 return;
757 }
758
759 /* log status, but don't act on it, we don't need to resubmit anything
760 * anyhow */
761 if (status)
762 handle_usb_error(status, __func__, odev->parent);
763
764 hso_put_activity(odev->parent);
765
766 /* Tell the network interface we are ready for another frame */
767 netif_wake_queue(odev->net);
768}
769
770/* called by kernel when we need to transmit a packet */
771static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
772 struct net_device *net)
773{
774 struct hso_net *odev = netdev_priv(net);
775 int result;
776
777 /* Tell the kernel, "No more frames 'til we are done with this one." */
778 netif_stop_queue(net);
779 if (hso_get_activity(odev->parent) == -EAGAIN) {
780 odev->skb_tx_buf = skb;
781 return NETDEV_TX_OK;
782 }
783
784 /* log if asked */
785 DUMP1(skb->data, skb->len);
786 /* Copy it from kernel memory to OUR memory */
787 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
788 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE);
789
790 /* Fill in the URB for shipping it out. */
791 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
792 odev->parent->usb,
793 usb_sndbulkpipe(odev->parent->usb,
794 odev->out_endp->
795 bEndpointAddress & 0x7F),
796 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
797 odev);
798
799 /* Deal with the Zero Length packet problem, I hope */
800 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
801
802 /* Send the URB on its merry way. */
803 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
804 if (result) {
805 dev_warn(&odev->parent->interface->dev,
806 "failed mux_bulk_tx_urb %d\n", result);
807 net->stats.tx_errors++;
808 netif_start_queue(net);
809 } else {
810 net->stats.tx_packets++;
811 net->stats.tx_bytes += skb->len;
812 }
813 dev_kfree_skb(skb);
814 /* we're done */
815 return NETDEV_TX_OK;
816}
817
818static const struct ethtool_ops ops = {
819 .get_link = ethtool_op_get_link
820};
821
822/* called when a packet did not ack after watchdogtimeout */
823static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue)
824{
825 struct hso_net *odev = netdev_priv(net);
826
827 if (!odev)
828 return;
829
830 /* Tell syslog we are hosed. */
831 dev_warn(&net->dev, "Tx timed out.\n");
832
833 /* Tear the waiting frame off the list */
834 if (odev->mux_bulk_tx_urb)
835 usb_unlink_urb(odev->mux_bulk_tx_urb);
836
837 /* Update statistics */
838 net->stats.tx_errors++;
839}
840
841/* make a real packet from the received USB buffer */
842static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
843 unsigned int count, unsigned char is_eop)
844{
845 unsigned short temp_bytes;
846 unsigned short buffer_offset = 0;
847 unsigned short frame_len;
848
849 /* log if needed */
850 hso_dbg(0x1, "Rx %d bytes\n", count);
851 DUMP(ip_pkt, min(128, (int)count));
852
853 while (count) {
854 switch (odev->rx_parse_state) {
855 case WAIT_IP:
856 /* waiting for IP header. */
857 /* wanted bytes - size of ip header */
858 temp_bytes =
859 (count <
860 odev->rx_buf_missing) ? count : odev->
861 rx_buf_missing;
862
863 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
864 odev->rx_buf_size, ip_pkt + buffer_offset,
865 temp_bytes);
866
867 odev->rx_buf_size += temp_bytes;
868 buffer_offset += temp_bytes;
869 odev->rx_buf_missing -= temp_bytes;
870 count -= temp_bytes;
871
872 if (!odev->rx_buf_missing) {
873 /* header is complete allocate an sk_buffer and
874 * continue to WAIT_DATA */
875 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
876
877 if ((frame_len > DEFAULT_MRU) ||
878 (frame_len < sizeof(struct iphdr))) {
879 dev_err(&odev->net->dev,
880 "Invalid frame (%d) length\n",
881 frame_len);
882 odev->rx_parse_state = WAIT_SYNC;
883 continue;
884 }
885 /* Allocate an sk_buff */
886 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
887 frame_len);
888 if (!odev->skb_rx_buf) {
889 /* We got no receive buffer. */
890 hso_dbg(0x1, "could not allocate memory\n");
891 odev->rx_parse_state = WAIT_SYNC;
892 continue;
893 }
894
895 /* Copy what we got so far. make room for iphdr
896 * after tail. */
897 skb_put_data(odev->skb_rx_buf,
898 (char *)&(odev->rx_ip_hdr),
899 sizeof(struct iphdr));
900
901 /* ETH_HLEN */
902 odev->rx_buf_size = sizeof(struct iphdr);
903
904 /* Filip actually use .tot_len */
905 odev->rx_buf_missing =
906 frame_len - sizeof(struct iphdr);
907 odev->rx_parse_state = WAIT_DATA;
908 }
909 break;
910
911 case WAIT_DATA:
912 temp_bytes = (count < odev->rx_buf_missing)
913 ? count : odev->rx_buf_missing;
914
915 /* Copy the rest of the bytes that are left in the
916 * buffer into the waiting sk_buf. */
917 /* Make room for temp_bytes after tail. */
918 skb_put_data(odev->skb_rx_buf,
919 ip_pkt + buffer_offset,
920 temp_bytes);
921
922 odev->rx_buf_missing -= temp_bytes;
923 count -= temp_bytes;
924 buffer_offset += temp_bytes;
925 odev->rx_buf_size += temp_bytes;
926 if (!odev->rx_buf_missing) {
927 /* Packet is complete. Inject into stack. */
928 /* We have IP packet here */
929 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
930 skb_reset_mac_header(odev->skb_rx_buf);
931
932 /* Ship it off to the kernel */
933 netif_rx(odev->skb_rx_buf);
934 /* No longer our buffer. */
935 odev->skb_rx_buf = NULL;
936
937 /* update out statistics */
938 odev->net->stats.rx_packets++;
939
940 odev->net->stats.rx_bytes += odev->rx_buf_size;
941
942 odev->rx_buf_size = 0;
943 odev->rx_buf_missing = sizeof(struct iphdr);
944 odev->rx_parse_state = WAIT_IP;
945 }
946 break;
947
948 case WAIT_SYNC:
949 hso_dbg(0x1, " W_S\n");
950 count = 0;
951 break;
952 default:
953 hso_dbg(0x1, "\n");
954 count--;
955 break;
956 }
957 }
958
959 /* Recovery mechanism for WAIT_SYNC state. */
960 if (is_eop) {
961 if (odev->rx_parse_state == WAIT_SYNC) {
962 odev->rx_parse_state = WAIT_IP;
963 odev->rx_buf_size = 0;
964 odev->rx_buf_missing = sizeof(struct iphdr);
965 }
966 }
967}
968
969static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
970{
971 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
972 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
973
974 if (((rest == 5) || (rest == 6)) &&
975 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
976 crc_check, 4)) {
977 urb->actual_length -= 4;
978 }
979}
980
981/* Moving data from usb to kernel (in interrupt state) */
982static void read_bulk_callback(struct urb *urb)
983{
984 struct hso_net *odev = urb->context;
985 struct net_device *net;
986 int result;
987 unsigned long flags;
988 int status = urb->status;
989
990 /* is al ok? (Filip: Who's Al ?) */
991 if (status) {
992 handle_usb_error(status, __func__, odev->parent);
993 return;
994 }
995
996 /* Sanity check */
997 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
998 hso_dbg(0x1, "BULK IN callback but driver is not active!\n");
999 return;
1000 }
1001 usb_mark_last_busy(urb->dev);
1002
1003 net = odev->net;
1004
1005 if (!netif_device_present(net)) {
1006 /* Somebody killed our network interface... */
1007 return;
1008 }
1009
1010 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1011 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1012
1013 /* do we even have a packet? */
1014 if (urb->actual_length) {
1015 /* Handle the IP stream, add header and push it onto network
1016 * stack if the packet is complete. */
1017 spin_lock_irqsave(&odev->net_lock, flags);
1018 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1019 (urb->transfer_buffer_length >
1020 urb->actual_length) ? 1 : 0);
1021 spin_unlock_irqrestore(&odev->net_lock, flags);
1022 }
1023
1024 /* We are done with this URB, resubmit it. Prep the USB to wait for
1025 * another frame. Reuse same as received. */
1026 usb_fill_bulk_urb(urb,
1027 odev->parent->usb,
1028 usb_rcvbulkpipe(odev->parent->usb,
1029 odev->in_endp->
1030 bEndpointAddress & 0x7F),
1031 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1032 read_bulk_callback, odev);
1033
1034 /* Give this to the USB subsystem so it can tell us when more data
1035 * arrives. */
1036 result = usb_submit_urb(urb, GFP_ATOMIC);
1037 if (result)
1038 dev_warn(&odev->parent->interface->dev,
1039 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1040 result);
1041}
1042
1043/* Serial driver functions */
1044
1045static void hso_init_termios(struct ktermios *termios)
1046{
1047 /*
1048 * The default requirements for this device are:
1049 */
1050 termios->c_iflag &=
1051 ~(IGNBRK /* disable ignore break */
1052 | BRKINT /* disable break causes interrupt */
1053 | PARMRK /* disable mark parity errors */
1054 | ISTRIP /* disable clear high bit of input characters */
1055 | INLCR /* disable translate NL to CR */
1056 | IGNCR /* disable ignore CR */
1057 | ICRNL /* disable translate CR to NL */
1058 | IXON); /* disable enable XON/XOFF flow control */
1059
1060 /* disable postprocess output characters */
1061 termios->c_oflag &= ~OPOST;
1062
1063 termios->c_lflag &=
1064 ~(ECHO /* disable echo input characters */
1065 | ECHONL /* disable echo new line */
1066 | ICANON /* disable erase, kill, werase, and rprnt
1067 special characters */
1068 | ISIG /* disable interrupt, quit, and suspend special
1069 characters */
1070 | IEXTEN); /* disable non-POSIX special characters */
1071
1072 termios->c_cflag &=
1073 ~(CSIZE /* no size */
1074 | PARENB /* disable parity bit */
1075 | CBAUD /* clear current baud rate */
1076 | CBAUDEX); /* clear current buad rate */
1077
1078 termios->c_cflag |= CS8; /* character size 8 bits */
1079
1080 /* baud rate 115200 */
1081 tty_termios_encode_baud_rate(termios, 115200, 115200);
1082}
1083
1084static void _hso_serial_set_termios(struct tty_struct *tty,
1085 struct ktermios *old)
1086{
1087 struct hso_serial *serial = tty->driver_data;
1088
1089 if (!serial) {
1090 pr_err("%s: no tty structures", __func__);
1091 return;
1092 }
1093
1094 hso_dbg(0x8, "port %d\n", serial->minor);
1095
1096 /*
1097 * Fix up unsupported bits
1098 */
1099 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1100
1101 tty->termios.c_cflag &=
1102 ~(CSIZE /* no size */
1103 | PARENB /* disable parity bit */
1104 | CBAUD /* clear current baud rate */
1105 | CBAUDEX); /* clear current buad rate */
1106
1107 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1108
1109 /* baud rate 115200 */
1110 tty_encode_baud_rate(tty, 115200, 115200);
1111}
1112
1113static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1114{
1115 int result;
1116 /* We are done with this URB, resubmit it. Prep the USB to wait for
1117 * another frame */
1118 usb_fill_bulk_urb(urb, serial->parent->usb,
1119 usb_rcvbulkpipe(serial->parent->usb,
1120 serial->in_endp->
1121 bEndpointAddress & 0x7F),
1122 urb->transfer_buffer, serial->rx_data_length,
1123 hso_std_serial_read_bulk_callback, serial);
1124 /* Give this to the USB subsystem so it can tell us when more data
1125 * arrives. */
1126 result = usb_submit_urb(urb, GFP_ATOMIC);
1127 if (result) {
1128 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1129 __func__, result);
1130 }
1131}
1132
1133
1134
1135
1136static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1137{
1138 int count;
1139 struct urb *curr_urb;
1140
1141 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1142 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1143 count = put_rxbuf_data(curr_urb, serial);
1144 if (count == -1)
1145 return;
1146 if (count == 0) {
1147 serial->curr_rx_urb_idx++;
1148 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1149 serial->curr_rx_urb_idx = 0;
1150 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1151 }
1152 }
1153}
1154
1155static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1156{
1157 int count = 0;
1158 struct urb *urb;
1159
1160 urb = serial->rx_urb[0];
1161 if (serial->port.count > 0) {
1162 count = put_rxbuf_data(urb, serial);
1163 if (count == -1)
1164 return;
1165 }
1166 /* Re issue a read as long as we receive data. */
1167
1168 if (count == 0 && ((urb->actual_length != 0) ||
1169 (serial->rx_state == RX_PENDING))) {
1170 serial->rx_state = RX_SENT;
1171 hso_mux_serial_read(serial);
1172 } else
1173 serial->rx_state = RX_IDLE;
1174}
1175
1176
1177/* read callback for Diag and CS port */
1178static void hso_std_serial_read_bulk_callback(struct urb *urb)
1179{
1180 struct hso_serial *serial = urb->context;
1181 int status = urb->status;
1182 unsigned long flags;
1183
1184 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
1185
1186 /* sanity check */
1187 if (!serial) {
1188 hso_dbg(0x1, "serial == NULL\n");
1189 return;
1190 }
1191 if (status) {
1192 handle_usb_error(status, __func__, serial->parent);
1193 return;
1194 }
1195
1196 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
1197 DUMP1(urb->transfer_buffer, urb->actual_length);
1198
1199 /* Anyone listening? */
1200 if (serial->port.count == 0)
1201 return;
1202
1203 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1204 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1205 /* Valid data, handle RX data */
1206 spin_lock_irqsave(&serial->serial_lock, flags);
1207 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1208 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1209 spin_unlock_irqrestore(&serial->serial_lock, flags);
1210}
1211
1212/*
1213 * This needs to be a tasklet otherwise we will
1214 * end up recursively calling this function.
1215 */
1216static void hso_unthrottle_tasklet(unsigned long data)
1217{
1218 struct hso_serial *serial = (struct hso_serial *)data;
1219 unsigned long flags;
1220
1221 spin_lock_irqsave(&serial->serial_lock, flags);
1222 if ((serial->parent->port_spec & HSO_INTF_MUX))
1223 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1224 else
1225 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1226 spin_unlock_irqrestore(&serial->serial_lock, flags);
1227}
1228
1229static void hso_unthrottle(struct tty_struct *tty)
1230{
1231 struct hso_serial *serial = tty->driver_data;
1232
1233 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1234}
1235
1236/* open the requested serial port */
1237static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1238{
1239 struct hso_serial *serial = get_serial_by_index(tty->index);
1240 int result;
1241
1242 /* sanity check */
1243 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1244 WARN_ON(1);
1245 tty->driver_data = NULL;
1246 hso_dbg(0x1, "Failed to open port\n");
1247 return -ENODEV;
1248 }
1249
1250 mutex_lock(&serial->parent->mutex);
1251 result = usb_autopm_get_interface(serial->parent->interface);
1252 if (result < 0)
1253 goto err_out;
1254
1255 hso_dbg(0x1, "Opening %d\n", serial->minor);
1256
1257 /* setup */
1258 tty->driver_data = serial;
1259 tty_port_tty_set(&serial->port, tty);
1260
1261 /* check for port already opened, if not set the termios */
1262 serial->port.count++;
1263 if (serial->port.count == 1) {
1264 serial->rx_state = RX_IDLE;
1265 /* Force default termio settings */
1266 _hso_serial_set_termios(tty, NULL);
1267 tasklet_init(&serial->unthrottle_tasklet,
1268 hso_unthrottle_tasklet,
1269 (unsigned long)serial);
1270 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1271 if (result) {
1272 hso_stop_serial_device(serial->parent);
1273 serial->port.count--;
1274 } else {
1275 kref_get(&serial->parent->ref);
1276 }
1277 } else {
1278 hso_dbg(0x1, "Port was already open\n");
1279 }
1280
1281 usb_autopm_put_interface(serial->parent->interface);
1282
1283 /* done */
1284 if (result)
1285 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1286err_out:
1287 mutex_unlock(&serial->parent->mutex);
1288 return result;
1289}
1290
1291/* close the requested serial port */
1292static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1293{
1294 struct hso_serial *serial = tty->driver_data;
1295 u8 usb_gone;
1296
1297 hso_dbg(0x1, "Closing serial port\n");
1298
1299 /* Open failed, no close cleanup required */
1300 if (serial == NULL)
1301 return;
1302
1303 mutex_lock(&serial->parent->mutex);
1304 usb_gone = serial->parent->usb_gone;
1305
1306 if (!usb_gone)
1307 usb_autopm_get_interface(serial->parent->interface);
1308
1309 /* reset the rts and dtr */
1310 /* do the actual close */
1311 serial->port.count--;
1312
1313 if (serial->port.count <= 0) {
1314 serial->port.count = 0;
1315 tty_port_tty_set(&serial->port, NULL);
1316 if (!usb_gone)
1317 hso_stop_serial_device(serial->parent);
1318 tasklet_kill(&serial->unthrottle_tasklet);
1319 }
1320
1321 if (!usb_gone)
1322 usb_autopm_put_interface(serial->parent->interface);
1323
1324 mutex_unlock(&serial->parent->mutex);
1325}
1326
1327/* close the requested serial port */
1328static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1329 int count)
1330{
1331 struct hso_serial *serial = tty->driver_data;
1332 int space, tx_bytes;
1333 unsigned long flags;
1334
1335 /* sanity check */
1336 if (serial == NULL) {
1337 pr_err("%s: serial is NULL\n", __func__);
1338 return -ENODEV;
1339 }
1340
1341 spin_lock_irqsave(&serial->serial_lock, flags);
1342
1343 space = serial->tx_data_length - serial->tx_buffer_count;
1344 tx_bytes = (count < space) ? count : space;
1345
1346 if (!tx_bytes)
1347 goto out;
1348
1349 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1350 serial->tx_buffer_count += tx_bytes;
1351
1352out:
1353 spin_unlock_irqrestore(&serial->serial_lock, flags);
1354
1355 hso_kick_transmit(serial);
1356 /* done */
1357 return tx_bytes;
1358}
1359
1360/* how much room is there for writing */
1361static int hso_serial_write_room(struct tty_struct *tty)
1362{
1363 struct hso_serial *serial = tty->driver_data;
1364 int room;
1365 unsigned long flags;
1366
1367 spin_lock_irqsave(&serial->serial_lock, flags);
1368 room = serial->tx_data_length - serial->tx_buffer_count;
1369 spin_unlock_irqrestore(&serial->serial_lock, flags);
1370
1371 /* return free room */
1372 return room;
1373}
1374
1375static void hso_serial_cleanup(struct tty_struct *tty)
1376{
1377 struct hso_serial *serial = tty->driver_data;
1378
1379 if (!serial)
1380 return;
1381
1382 kref_put(&serial->parent->ref, hso_serial_ref_free);
1383}
1384
1385/* setup the term */
1386static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1387{
1388 struct hso_serial *serial = tty->driver_data;
1389 unsigned long flags;
1390
1391 if (old)
1392 hso_dbg(0x16, "Termios called with: cflags new[%u] - old[%u]\n",
1393 (unsigned int)tty->termios.c_cflag,
1394 (unsigned int)old->c_cflag);
1395
1396 /* the actual setup */
1397 spin_lock_irqsave(&serial->serial_lock, flags);
1398 if (serial->port.count)
1399 _hso_serial_set_termios(tty, old);
1400 else
1401 tty->termios = *old;
1402 spin_unlock_irqrestore(&serial->serial_lock, flags);
1403
1404 /* done */
1405}
1406
1407/* how many characters in the buffer */
1408static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1409{
1410 struct hso_serial *serial = tty->driver_data;
1411 int chars;
1412 unsigned long flags;
1413
1414 /* sanity check */
1415 if (serial == NULL)
1416 return 0;
1417
1418 spin_lock_irqsave(&serial->serial_lock, flags);
1419 chars = serial->tx_buffer_count;
1420 spin_unlock_irqrestore(&serial->serial_lock, flags);
1421
1422 return chars;
1423}
1424static int tiocmget_submit_urb(struct hso_serial *serial,
1425 struct hso_tiocmget *tiocmget,
1426 struct usb_device *usb)
1427{
1428 int result;
1429
1430 if (serial->parent->usb_gone)
1431 return -ENODEV;
1432 usb_fill_int_urb(tiocmget->urb, usb,
1433 usb_rcvintpipe(usb,
1434 tiocmget->endp->
1435 bEndpointAddress & 0x7F),
1436 tiocmget->serial_state_notification,
1437 sizeof(struct hso_serial_state_notification),
1438 tiocmget_intr_callback, serial,
1439 tiocmget->endp->bInterval);
1440 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1441 if (result) {
1442 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1443 result);
1444 }
1445 return result;
1446
1447}
1448
1449static void tiocmget_intr_callback(struct urb *urb)
1450{
1451 struct hso_serial *serial = urb->context;
1452 struct hso_tiocmget *tiocmget;
1453 int status = urb->status;
1454 u16 UART_state_bitmap, prev_UART_state_bitmap;
1455 struct uart_icount *icount;
1456 struct hso_serial_state_notification *serial_state_notification;
1457 struct usb_device *usb;
1458 struct usb_interface *interface;
1459 int if_num;
1460
1461 /* Sanity checks */
1462 if (!serial)
1463 return;
1464 if (status) {
1465 handle_usb_error(status, __func__, serial->parent);
1466 return;
1467 }
1468
1469 /* tiocmget is only supported on HSO_PORT_MODEM */
1470 tiocmget = serial->tiocmget;
1471 if (!tiocmget)
1472 return;
1473 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1474
1475 usb = serial->parent->usb;
1476 interface = serial->parent->interface;
1477
1478 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1479
1480 /* wIndex should be the USB interface number of the port to which the
1481 * notification applies, which should always be the Modem port.
1482 */
1483 serial_state_notification = tiocmget->serial_state_notification;
1484 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1485 serial_state_notification->bNotification != B_NOTIFICATION ||
1486 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1487 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1488 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1489 dev_warn(&usb->dev,
1490 "hso received invalid serial state notification\n");
1491 DUMP(serial_state_notification,
1492 sizeof(struct hso_serial_state_notification));
1493 } else {
1494 unsigned long flags;
1495
1496 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1497 UART_state_bitmap);
1498 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1499 icount = &tiocmget->icount;
1500 spin_lock_irqsave(&serial->serial_lock, flags);
1501 if ((UART_state_bitmap & B_OVERRUN) !=
1502 (prev_UART_state_bitmap & B_OVERRUN))
1503 icount->parity++;
1504 if ((UART_state_bitmap & B_PARITY) !=
1505 (prev_UART_state_bitmap & B_PARITY))
1506 icount->parity++;
1507 if ((UART_state_bitmap & B_FRAMING) !=
1508 (prev_UART_state_bitmap & B_FRAMING))
1509 icount->frame++;
1510 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1511 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1512 icount->rng++;
1513 if ((UART_state_bitmap & B_BREAK) !=
1514 (prev_UART_state_bitmap & B_BREAK))
1515 icount->brk++;
1516 if ((UART_state_bitmap & B_TX_CARRIER) !=
1517 (prev_UART_state_bitmap & B_TX_CARRIER))
1518 icount->dsr++;
1519 if ((UART_state_bitmap & B_RX_CARRIER) !=
1520 (prev_UART_state_bitmap & B_RX_CARRIER))
1521 icount->dcd++;
1522 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1523 spin_unlock_irqrestore(&serial->serial_lock, flags);
1524 tiocmget->intr_completed = 1;
1525 wake_up_interruptible(&tiocmget->waitq);
1526 }
1527 memset(serial_state_notification, 0,
1528 sizeof(struct hso_serial_state_notification));
1529 tiocmget_submit_urb(serial,
1530 tiocmget,
1531 serial->parent->usb);
1532}
1533
1534/*
1535 * next few functions largely stolen from drivers/serial/serial_core.c
1536 */
1537/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1538 * - mask passed in arg for lines of interest
1539 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1540 * Caller should use TIOCGICOUNT to see which one it was
1541 */
1542static int
1543hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1544{
1545 DECLARE_WAITQUEUE(wait, current);
1546 struct uart_icount cprev, cnow;
1547 struct hso_tiocmget *tiocmget;
1548 int ret;
1549
1550 tiocmget = serial->tiocmget;
1551 if (!tiocmget)
1552 return -ENOENT;
1553 /*
1554 * note the counters on entry
1555 */
1556 spin_lock_irq(&serial->serial_lock);
1557 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1558 spin_unlock_irq(&serial->serial_lock);
1559 add_wait_queue(&tiocmget->waitq, &wait);
1560 for (;;) {
1561 spin_lock_irq(&serial->serial_lock);
1562 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1563 spin_unlock_irq(&serial->serial_lock);
1564 set_current_state(TASK_INTERRUPTIBLE);
1565 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1566 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1567 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1568 ret = 0;
1569 break;
1570 }
1571 schedule();
1572 /* see if a signal did it */
1573 if (signal_pending(current)) {
1574 ret = -ERESTARTSYS;
1575 break;
1576 }
1577 cprev = cnow;
1578 }
1579 __set_current_state(TASK_RUNNING);
1580 remove_wait_queue(&tiocmget->waitq, &wait);
1581
1582 return ret;
1583}
1584
1585/*
1586 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1587 * Return: write counters to the user passed counter struct
1588 * NB: both 1->0 and 0->1 transitions are counted except for
1589 * RI where only 0->1 is counted.
1590 */
1591static int hso_get_count(struct tty_struct *tty,
1592 struct serial_icounter_struct *icount)
1593{
1594 struct uart_icount cnow;
1595 struct hso_serial *serial = tty->driver_data;
1596 struct hso_tiocmget *tiocmget = serial->tiocmget;
1597
1598 memset(icount, 0, sizeof(struct serial_icounter_struct));
1599
1600 if (!tiocmget)
1601 return -ENOENT;
1602 spin_lock_irq(&serial->serial_lock);
1603 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1604 spin_unlock_irq(&serial->serial_lock);
1605
1606 icount->cts = cnow.cts;
1607 icount->dsr = cnow.dsr;
1608 icount->rng = cnow.rng;
1609 icount->dcd = cnow.dcd;
1610 icount->rx = cnow.rx;
1611 icount->tx = cnow.tx;
1612 icount->frame = cnow.frame;
1613 icount->overrun = cnow.overrun;
1614 icount->parity = cnow.parity;
1615 icount->brk = cnow.brk;
1616 icount->buf_overrun = cnow.buf_overrun;
1617
1618 return 0;
1619}
1620
1621
1622static int hso_serial_tiocmget(struct tty_struct *tty)
1623{
1624 int retval;
1625 struct hso_serial *serial = tty->driver_data;
1626 struct hso_tiocmget *tiocmget;
1627 u16 UART_state_bitmap;
1628
1629 /* sanity check */
1630 if (!serial) {
1631 hso_dbg(0x1, "no tty structures\n");
1632 return -EINVAL;
1633 }
1634 spin_lock_irq(&serial->serial_lock);
1635 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1636 ((serial->dtr_state) ? TIOCM_DTR : 0);
1637 tiocmget = serial->tiocmget;
1638 if (tiocmget) {
1639
1640 UART_state_bitmap = le16_to_cpu(
1641 tiocmget->prev_UART_state_bitmap);
1642 if (UART_state_bitmap & B_RING_SIGNAL)
1643 retval |= TIOCM_RNG;
1644 if (UART_state_bitmap & B_RX_CARRIER)
1645 retval |= TIOCM_CD;
1646 if (UART_state_bitmap & B_TX_CARRIER)
1647 retval |= TIOCM_DSR;
1648 }
1649 spin_unlock_irq(&serial->serial_lock);
1650 return retval;
1651}
1652
1653static int hso_serial_tiocmset(struct tty_struct *tty,
1654 unsigned int set, unsigned int clear)
1655{
1656 int val = 0;
1657 unsigned long flags;
1658 int if_num;
1659 struct hso_serial *serial = tty->driver_data;
1660 struct usb_interface *interface;
1661
1662 /* sanity check */
1663 if (!serial) {
1664 hso_dbg(0x1, "no tty structures\n");
1665 return -EINVAL;
1666 }
1667
1668 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1669 return -EINVAL;
1670
1671 interface = serial->parent->interface;
1672 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1673
1674 spin_lock_irqsave(&serial->serial_lock, flags);
1675 if (set & TIOCM_RTS)
1676 serial->rts_state = 1;
1677 if (set & TIOCM_DTR)
1678 serial->dtr_state = 1;
1679
1680 if (clear & TIOCM_RTS)
1681 serial->rts_state = 0;
1682 if (clear & TIOCM_DTR)
1683 serial->dtr_state = 0;
1684
1685 if (serial->dtr_state)
1686 val |= 0x01;
1687 if (serial->rts_state)
1688 val |= 0x02;
1689
1690 spin_unlock_irqrestore(&serial->serial_lock, flags);
1691
1692 return usb_control_msg(serial->parent->usb,
1693 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1694 0x21, val, if_num, NULL, 0,
1695 USB_CTRL_SET_TIMEOUT);
1696}
1697
1698static int hso_serial_ioctl(struct tty_struct *tty,
1699 unsigned int cmd, unsigned long arg)
1700{
1701 struct hso_serial *serial = tty->driver_data;
1702 int ret = 0;
1703 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1704
1705 if (!serial)
1706 return -ENODEV;
1707 switch (cmd) {
1708 case TIOCMIWAIT:
1709 ret = hso_wait_modem_status(serial, arg);
1710 break;
1711 default:
1712 ret = -ENOIOCTLCMD;
1713 break;
1714 }
1715 return ret;
1716}
1717
1718
1719/* starts a transmit */
1720static void hso_kick_transmit(struct hso_serial *serial)
1721{
1722 unsigned long flags;
1723 int res;
1724
1725 spin_lock_irqsave(&serial->serial_lock, flags);
1726 if (!serial->tx_buffer_count)
1727 goto out;
1728
1729 if (serial->tx_urb_used)
1730 goto out;
1731
1732 /* Wakeup USB interface if necessary */
1733 if (hso_get_activity(serial->parent) == -EAGAIN)
1734 goto out;
1735
1736 /* Switch pointers around to avoid memcpy */
1737 swap(serial->tx_buffer, serial->tx_data);
1738 serial->tx_data_count = serial->tx_buffer_count;
1739 serial->tx_buffer_count = 0;
1740
1741 /* If serial->tx_data is set, it means we switched buffers */
1742 if (serial->tx_data && serial->write_data) {
1743 res = serial->write_data(serial);
1744 if (res >= 0)
1745 serial->tx_urb_used = 1;
1746 }
1747out:
1748 spin_unlock_irqrestore(&serial->serial_lock, flags);
1749}
1750
1751/* make a request (for reading and writing data to muxed serial port) */
1752static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1753 struct urb *ctrl_urb,
1754 struct usb_ctrlrequest *ctrl_req,
1755 u8 *ctrl_urb_data, u32 size)
1756{
1757 int result;
1758 int pipe;
1759
1760 /* Sanity check */
1761 if (!serial || !ctrl_urb || !ctrl_req) {
1762 pr_err("%s: Wrong arguments\n", __func__);
1763 return -EINVAL;
1764 }
1765
1766 /* initialize */
1767 ctrl_req->wValue = 0;
1768 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1769 ctrl_req->wLength = cpu_to_le16(size);
1770
1771 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1772 /* Reading command */
1773 ctrl_req->bRequestType = USB_DIR_IN |
1774 USB_TYPE_OPTION_VENDOR |
1775 USB_RECIP_INTERFACE;
1776 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1777 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1778 } else {
1779 /* Writing command */
1780 ctrl_req->bRequestType = USB_DIR_OUT |
1781 USB_TYPE_OPTION_VENDOR |
1782 USB_RECIP_INTERFACE;
1783 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1784 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1785 }
1786 /* syslog */
1787 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1788 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1789 ctrl_req->bRequestType, ctrl_req->wLength, port);
1790
1791 /* Load ctrl urb */
1792 ctrl_urb->transfer_flags = 0;
1793 usb_fill_control_urb(ctrl_urb,
1794 serial->parent->usb,
1795 pipe,
1796 (u8 *) ctrl_req,
1797 ctrl_urb_data, size, ctrl_callback, serial);
1798 /* Send it on merry way */
1799 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1800 if (result) {
1801 dev_err(&ctrl_urb->dev->dev,
1802 "%s failed submit ctrl_urb %d type %d\n", __func__,
1803 result, type);
1804 return result;
1805 }
1806
1807 /* done */
1808 return size;
1809}
1810
1811/* called by intr_callback when read occurs */
1812static int hso_mux_serial_read(struct hso_serial *serial)
1813{
1814 if (!serial)
1815 return -EINVAL;
1816
1817 /* clean data */
1818 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1819 /* make the request */
1820
1821 if (serial->num_rx_urbs != 1) {
1822 dev_err(&serial->parent->interface->dev,
1823 "ERROR: mux'd reads with multiple buffers "
1824 "not possible\n");
1825 return 0;
1826 }
1827 return mux_device_request(serial,
1828 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1829 serial->parent->port_spec & HSO_PORT_MASK,
1830 serial->rx_urb[0],
1831 &serial->ctrl_req_rx,
1832 serial->rx_data[0], serial->rx_data_length);
1833}
1834
1835/* used for muxed serial port callback (muxed serial read) */
1836static void intr_callback(struct urb *urb)
1837{
1838 struct hso_shared_int *shared_int = urb->context;
1839 struct hso_serial *serial;
1840 unsigned char *port_req;
1841 int status = urb->status;
1842 unsigned long flags;
1843 int i;
1844
1845 usb_mark_last_busy(urb->dev);
1846
1847 /* sanity check */
1848 if (!shared_int)
1849 return;
1850
1851 /* status check */
1852 if (status) {
1853 handle_usb_error(status, __func__, NULL);
1854 return;
1855 }
1856 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1857
1858 /* what request? */
1859 port_req = urb->transfer_buffer;
1860 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1861 /* loop over all muxed ports to find the one sending this */
1862 for (i = 0; i < 8; i++) {
1863 /* max 8 channels on MUX */
1864 if (*port_req & (1 << i)) {
1865 serial = get_serial_by_shared_int_and_type(shared_int,
1866 (1 << i));
1867 if (serial != NULL) {
1868 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1869 i);
1870 spin_lock_irqsave(&serial->serial_lock, flags);
1871 if (serial->rx_state == RX_IDLE &&
1872 serial->port.count > 0) {
1873 /* Setup and send a ctrl req read on
1874 * port i */
1875 if (!serial->rx_urb_filled[0]) {
1876 serial->rx_state = RX_SENT;
1877 hso_mux_serial_read(serial);
1878 } else
1879 serial->rx_state = RX_PENDING;
1880 } else {
1881 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1882 i);
1883 }
1884 spin_unlock_irqrestore(&serial->serial_lock,
1885 flags);
1886 }
1887 }
1888 }
1889 /* Resubmit interrupt urb */
1890 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1891}
1892
1893/* called for writing to muxed serial port */
1894static int hso_mux_serial_write_data(struct hso_serial *serial)
1895{
1896 if (NULL == serial)
1897 return -EINVAL;
1898
1899 return mux_device_request(serial,
1900 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1901 serial->parent->port_spec & HSO_PORT_MASK,
1902 serial->tx_urb,
1903 &serial->ctrl_req_tx,
1904 serial->tx_data, serial->tx_data_count);
1905}
1906
1907/* write callback for Diag and CS port */
1908static void hso_std_serial_write_bulk_callback(struct urb *urb)
1909{
1910 struct hso_serial *serial = urb->context;
1911 int status = urb->status;
1912 unsigned long flags;
1913
1914 /* sanity check */
1915 if (!serial) {
1916 hso_dbg(0x1, "serial == NULL\n");
1917 return;
1918 }
1919
1920 spin_lock_irqsave(&serial->serial_lock, flags);
1921 serial->tx_urb_used = 0;
1922 spin_unlock_irqrestore(&serial->serial_lock, flags);
1923 if (status) {
1924 handle_usb_error(status, __func__, serial->parent);
1925 return;
1926 }
1927 hso_put_activity(serial->parent);
1928 tty_port_tty_wakeup(&serial->port);
1929 hso_kick_transmit(serial);
1930
1931 hso_dbg(0x1, "\n");
1932}
1933
1934/* called for writing diag or CS serial port */
1935static int hso_std_serial_write_data(struct hso_serial *serial)
1936{
1937 int count = serial->tx_data_count;
1938 int result;
1939
1940 usb_fill_bulk_urb(serial->tx_urb,
1941 serial->parent->usb,
1942 usb_sndbulkpipe(serial->parent->usb,
1943 serial->out_endp->
1944 bEndpointAddress & 0x7F),
1945 serial->tx_data, serial->tx_data_count,
1946 hso_std_serial_write_bulk_callback, serial);
1947
1948 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1949 if (result) {
1950 dev_warn(&serial->parent->usb->dev,
1951 "Failed to submit urb - res %d\n", result);
1952 return result;
1953 }
1954
1955 return count;
1956}
1957
1958/* callback after read or write on muxed serial port */
1959static void ctrl_callback(struct urb *urb)
1960{
1961 struct hso_serial *serial = urb->context;
1962 struct usb_ctrlrequest *req;
1963 int status = urb->status;
1964 unsigned long flags;
1965
1966 /* sanity check */
1967 if (!serial)
1968 return;
1969
1970 spin_lock_irqsave(&serial->serial_lock, flags);
1971 serial->tx_urb_used = 0;
1972 spin_unlock_irqrestore(&serial->serial_lock, flags);
1973 if (status) {
1974 handle_usb_error(status, __func__, serial->parent);
1975 return;
1976 }
1977
1978 /* what request? */
1979 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1980 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1981 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1982 DUMP1(urb->transfer_buffer, urb->actual_length);
1983
1984 if (req->bRequestType ==
1985 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1986 /* response to a read command */
1987 serial->rx_urb_filled[0] = 1;
1988 spin_lock_irqsave(&serial->serial_lock, flags);
1989 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1990 spin_unlock_irqrestore(&serial->serial_lock, flags);
1991 } else {
1992 hso_put_activity(serial->parent);
1993 tty_port_tty_wakeup(&serial->port);
1994 /* response to a write command */
1995 hso_kick_transmit(serial);
1996 }
1997}
1998
1999/* handle RX data for serial port */
2000static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2001{
2002 struct tty_struct *tty;
2003 int count;
2004
2005 /* Sanity check */
2006 if (urb == NULL || serial == NULL) {
2007 hso_dbg(0x1, "serial = NULL\n");
2008 return -2;
2009 }
2010
2011 tty = tty_port_tty_get(&serial->port);
2012
2013 if (tty && tty_throttled(tty)) {
2014 tty_kref_put(tty);
2015 return -1;
2016 }
2017
2018 /* Push data to tty */
2019 hso_dbg(0x1, "data to push to tty\n");
2020 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2021 if (count >= urb->actual_length) {
2022 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2023 urb->actual_length);
2024 tty_flip_buffer_push(&serial->port);
2025 } else {
2026 dev_warn(&serial->parent->usb->dev,
2027 "dropping data, %d bytes lost\n", urb->actual_length);
2028 }
2029
2030 tty_kref_put(tty);
2031
2032 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2033
2034 return 0;
2035}
2036
2037
2038/* Base driver functions */
2039
2040static void hso_log_port(struct hso_device *hso_dev)
2041{
2042 char *port_type;
2043 char port_dev[20];
2044
2045 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2046 case HSO_PORT_CONTROL:
2047 port_type = "Control";
2048 break;
2049 case HSO_PORT_APP:
2050 port_type = "Application";
2051 break;
2052 case HSO_PORT_GPS:
2053 port_type = "GPS";
2054 break;
2055 case HSO_PORT_GPS_CONTROL:
2056 port_type = "GPS control";
2057 break;
2058 case HSO_PORT_APP2:
2059 port_type = "Application2";
2060 break;
2061 case HSO_PORT_PCSC:
2062 port_type = "PCSC";
2063 break;
2064 case HSO_PORT_DIAG:
2065 port_type = "Diagnostic";
2066 break;
2067 case HSO_PORT_DIAG2:
2068 port_type = "Diagnostic2";
2069 break;
2070 case HSO_PORT_MODEM:
2071 port_type = "Modem";
2072 break;
2073 case HSO_PORT_NETWORK:
2074 port_type = "Network";
2075 break;
2076 default:
2077 port_type = "Unknown";
2078 break;
2079 }
2080 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2081 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2082 } else
2083 sprintf(port_dev, "/dev/%s%d", tty_filename,
2084 dev2ser(hso_dev)->minor);
2085
2086 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2087 port_type, port_dev);
2088}
2089
2090static int hso_start_net_device(struct hso_device *hso_dev)
2091{
2092 int i, result = 0;
2093 struct hso_net *hso_net = dev2net(hso_dev);
2094
2095 if (!hso_net)
2096 return -ENODEV;
2097
2098 /* send URBs for all read buffers */
2099 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2100
2101 /* Prep a receive URB */
2102 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2103 hso_dev->usb,
2104 usb_rcvbulkpipe(hso_dev->usb,
2105 hso_net->in_endp->
2106 bEndpointAddress & 0x7F),
2107 hso_net->mux_bulk_rx_buf_pool[i],
2108 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2109 hso_net);
2110
2111 /* Put it out there so the device can send us stuff */
2112 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2113 GFP_NOIO);
2114 if (result)
2115 dev_warn(&hso_dev->usb->dev,
2116 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2117 i, result);
2118 }
2119
2120 return result;
2121}
2122
2123static int hso_stop_net_device(struct hso_device *hso_dev)
2124{
2125 int i;
2126 struct hso_net *hso_net = dev2net(hso_dev);
2127
2128 if (!hso_net)
2129 return -ENODEV;
2130
2131 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2132 if (hso_net->mux_bulk_rx_urb_pool[i])
2133 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2134
2135 }
2136 if (hso_net->mux_bulk_tx_urb)
2137 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2138
2139 return 0;
2140}
2141
2142static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2143{
2144 int i, result = 0;
2145 struct hso_serial *serial = dev2ser(hso_dev);
2146
2147 if (!serial)
2148 return -ENODEV;
2149
2150 /* If it is not the MUX port fill in and submit a bulk urb (already
2151 * allocated in hso_serial_start) */
2152 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2153 for (i = 0; i < serial->num_rx_urbs; i++) {
2154 usb_fill_bulk_urb(serial->rx_urb[i],
2155 serial->parent->usb,
2156 usb_rcvbulkpipe(serial->parent->usb,
2157 serial->in_endp->
2158 bEndpointAddress &
2159 0x7F),
2160 serial->rx_data[i],
2161 serial->rx_data_length,
2162 hso_std_serial_read_bulk_callback,
2163 serial);
2164 result = usb_submit_urb(serial->rx_urb[i], flags);
2165 if (result) {
2166 dev_warn(&serial->parent->usb->dev,
2167 "Failed to submit urb - res %d\n",
2168 result);
2169 break;
2170 }
2171 }
2172 } else {
2173 mutex_lock(&serial->shared_int->shared_int_lock);
2174 if (!serial->shared_int->use_count) {
2175 result =
2176 hso_mux_submit_intr_urb(serial->shared_int,
2177 hso_dev->usb, flags);
2178 }
2179 serial->shared_int->use_count++;
2180 mutex_unlock(&serial->shared_int->shared_int_lock);
2181 }
2182 if (serial->tiocmget)
2183 tiocmget_submit_urb(serial,
2184 serial->tiocmget,
2185 serial->parent->usb);
2186 return result;
2187}
2188
2189static int hso_stop_serial_device(struct hso_device *hso_dev)
2190{
2191 int i;
2192 struct hso_serial *serial = dev2ser(hso_dev);
2193 struct hso_tiocmget *tiocmget;
2194
2195 if (!serial)
2196 return -ENODEV;
2197
2198 for (i = 0; i < serial->num_rx_urbs; i++) {
2199 if (serial->rx_urb[i]) {
2200 usb_kill_urb(serial->rx_urb[i]);
2201 serial->rx_urb_filled[i] = 0;
2202 }
2203 }
2204 serial->curr_rx_urb_idx = 0;
2205
2206 if (serial->tx_urb)
2207 usb_kill_urb(serial->tx_urb);
2208
2209 if (serial->shared_int) {
2210 mutex_lock(&serial->shared_int->shared_int_lock);
2211 if (serial->shared_int->use_count &&
2212 (--serial->shared_int->use_count == 0)) {
2213 struct urb *urb;
2214
2215 urb = serial->shared_int->shared_intr_urb;
2216 if (urb)
2217 usb_kill_urb(urb);
2218 }
2219 mutex_unlock(&serial->shared_int->shared_int_lock);
2220 }
2221 tiocmget = serial->tiocmget;
2222 if (tiocmget) {
2223 wake_up_interruptible(&tiocmget->waitq);
2224 usb_kill_urb(tiocmget->urb);
2225 }
2226
2227 return 0;
2228}
2229
2230static void hso_serial_tty_unregister(struct hso_serial *serial)
2231{
2232 tty_unregister_device(tty_drv, serial->minor);
2233}
2234
2235static void hso_serial_common_free(struct hso_serial *serial)
2236{
2237 int i;
2238
2239 for (i = 0; i < serial->num_rx_urbs; i++) {
2240 /* unlink and free RX URB */
2241 usb_free_urb(serial->rx_urb[i]);
2242 /* free the RX buffer */
2243 kfree(serial->rx_data[i]);
2244 }
2245
2246 /* unlink and free TX URB */
2247 usb_free_urb(serial->tx_urb);
2248 kfree(serial->tx_buffer);
2249 kfree(serial->tx_data);
2250 tty_port_destroy(&serial->port);
2251}
2252
2253static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2254 int rx_size, int tx_size)
2255{
2256 int minor;
2257 int i;
2258
2259 tty_port_init(&serial->port);
2260
2261 minor = get_free_serial_index();
2262 if (minor < 0)
2263 goto exit2;
2264
2265 /* register our minor number */
2266 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2267 tty_drv, minor, &serial->parent->interface->dev,
2268 serial->parent, hso_serial_dev_groups);
2269 if (IS_ERR(serial->parent->dev))
2270 goto exit2;
2271
2272 /* fill in specific data for later use */
2273 serial->minor = minor;
2274 serial->magic = HSO_SERIAL_MAGIC;
2275 spin_lock_init(&serial->serial_lock);
2276 serial->num_rx_urbs = num_urbs;
2277
2278 /* RX, allocate urb and initialize */
2279
2280 /* prepare our RX buffer */
2281 serial->rx_data_length = rx_size;
2282 for (i = 0; i < serial->num_rx_urbs; i++) {
2283 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2284 if (!serial->rx_urb[i])
2285 goto exit;
2286 serial->rx_urb[i]->transfer_buffer = NULL;
2287 serial->rx_urb[i]->transfer_buffer_length = 0;
2288 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2289 GFP_KERNEL);
2290 if (!serial->rx_data[i])
2291 goto exit;
2292 }
2293
2294 /* TX, allocate urb and initialize */
2295 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2296 if (!serial->tx_urb)
2297 goto exit;
2298 serial->tx_urb->transfer_buffer = NULL;
2299 serial->tx_urb->transfer_buffer_length = 0;
2300 /* prepare our TX buffer */
2301 serial->tx_data_count = 0;
2302 serial->tx_buffer_count = 0;
2303 serial->tx_data_length = tx_size;
2304 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2305 if (!serial->tx_data)
2306 goto exit;
2307
2308 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2309 if (!serial->tx_buffer)
2310 goto exit;
2311
2312 return 0;
2313exit:
2314 hso_serial_tty_unregister(serial);
2315exit2:
2316 hso_serial_common_free(serial);
2317 return -1;
2318}
2319
2320/* Creates a general hso device */
2321static struct hso_device *hso_create_device(struct usb_interface *intf,
2322 int port_spec)
2323{
2324 struct hso_device *hso_dev;
2325
2326 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2327 if (!hso_dev)
2328 return NULL;
2329
2330 hso_dev->port_spec = port_spec;
2331 hso_dev->usb = interface_to_usbdev(intf);
2332 hso_dev->interface = intf;
2333 kref_init(&hso_dev->ref);
2334 mutex_init(&hso_dev->mutex);
2335
2336 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2337 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2338
2339 return hso_dev;
2340}
2341
2342/* Removes a network device in the network device table */
2343static int remove_net_device(struct hso_device *hso_dev)
2344{
2345 int i;
2346
2347 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2348 if (network_table[i] == hso_dev) {
2349 network_table[i] = NULL;
2350 break;
2351 }
2352 }
2353 if (i == HSO_MAX_NET_DEVICES)
2354 return -1;
2355 return 0;
2356}
2357
2358/* Frees our network device */
2359static void hso_free_net_device(struct hso_device *hso_dev, bool bailout)
2360{
2361 int i;
2362 struct hso_net *hso_net = dev2net(hso_dev);
2363
2364 if (!hso_net)
2365 return;
2366
2367 remove_net_device(hso_net->parent);
2368
2369 if (hso_net->net)
2370 unregister_netdev(hso_net->net);
2371
2372 /* start freeing */
2373 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2374 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2375 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2376 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2377 }
2378 usb_free_urb(hso_net->mux_bulk_tx_urb);
2379 kfree(hso_net->mux_bulk_tx_buf);
2380 hso_net->mux_bulk_tx_buf = NULL;
2381
2382 if (hso_net->net && !bailout)
2383 free_netdev(hso_net->net);
2384
2385 kfree(hso_dev);
2386}
2387
2388static const struct net_device_ops hso_netdev_ops = {
2389 .ndo_open = hso_net_open,
2390 .ndo_stop = hso_net_close,
2391 .ndo_start_xmit = hso_net_start_xmit,
2392 .ndo_tx_timeout = hso_net_tx_timeout,
2393};
2394
2395/* initialize the network interface */
2396static void hso_net_init(struct net_device *net)
2397{
2398 struct hso_net *hso_net = netdev_priv(net);
2399
2400 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2401
2402 /* fill in the other fields */
2403 net->netdev_ops = &hso_netdev_ops;
2404 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2405 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2406 net->type = ARPHRD_NONE;
2407 net->mtu = DEFAULT_MTU - 14;
2408 net->tx_queue_len = 10;
2409 net->ethtool_ops = &ops;
2410
2411 /* and initialize the semaphore */
2412 spin_lock_init(&hso_net->net_lock);
2413}
2414
2415/* Adds a network device in the network device table */
2416static int add_net_device(struct hso_device *hso_dev)
2417{
2418 int i;
2419
2420 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2421 if (network_table[i] == NULL) {
2422 network_table[i] = hso_dev;
2423 break;
2424 }
2425 }
2426 if (i == HSO_MAX_NET_DEVICES)
2427 return -1;
2428 return 0;
2429}
2430
2431static int hso_rfkill_set_block(void *data, bool blocked)
2432{
2433 struct hso_device *hso_dev = data;
2434 int enabled = !blocked;
2435 int rv;
2436
2437 mutex_lock(&hso_dev->mutex);
2438 if (hso_dev->usb_gone)
2439 rv = 0;
2440 else
2441 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2442 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2443 USB_CTRL_SET_TIMEOUT);
2444 mutex_unlock(&hso_dev->mutex);
2445 return rv;
2446}
2447
2448static const struct rfkill_ops hso_rfkill_ops = {
2449 .set_block = hso_rfkill_set_block,
2450};
2451
2452/* Creates and sets up everything for rfkill */
2453static void hso_create_rfkill(struct hso_device *hso_dev,
2454 struct usb_interface *interface)
2455{
2456 struct hso_net *hso_net = dev2net(hso_dev);
2457 struct device *dev = &hso_net->net->dev;
2458 static u32 rfkill_counter;
2459
2460 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2461 rfkill_counter++);
2462
2463 hso_net->rfkill = rfkill_alloc(hso_net->name,
2464 &interface_to_usbdev(interface)->dev,
2465 RFKILL_TYPE_WWAN,
2466 &hso_rfkill_ops, hso_dev);
2467 if (!hso_net->rfkill)
2468 return;
2469
2470 if (rfkill_register(hso_net->rfkill) < 0) {
2471 rfkill_destroy(hso_net->rfkill);
2472 hso_net->rfkill = NULL;
2473 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2474 return;
2475 }
2476}
2477
2478static struct device_type hso_type = {
2479 .name = "wwan",
2480};
2481
2482/* Creates our network device */
2483static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2484 int port_spec)
2485{
2486 int result, i;
2487 struct net_device *net;
2488 struct hso_net *hso_net;
2489 struct hso_device *hso_dev;
2490
2491 hso_dev = hso_create_device(interface, port_spec);
2492 if (!hso_dev)
2493 return NULL;
2494
2495 /* allocate our network device, then we can put in our private data */
2496 /* call hso_net_init to do the basic initialization */
2497 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2498 hso_net_init);
2499 if (!net) {
2500 dev_err(&interface->dev, "Unable to create ethernet device\n");
2501 goto exit;
2502 }
2503
2504 hso_net = netdev_priv(net);
2505
2506 hso_dev->port_data.dev_net = hso_net;
2507 hso_net->net = net;
2508 hso_net->parent = hso_dev;
2509
2510 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2511 USB_DIR_IN);
2512 if (!hso_net->in_endp) {
2513 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2514 goto exit;
2515 }
2516 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2517 USB_DIR_OUT);
2518 if (!hso_net->out_endp) {
2519 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2520 goto exit;
2521 }
2522 SET_NETDEV_DEV(net, &interface->dev);
2523 SET_NETDEV_DEVTYPE(net, &hso_type);
2524
2525 /* start allocating */
2526 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2527 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2528 if (!hso_net->mux_bulk_rx_urb_pool[i])
2529 goto exit;
2530 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2531 GFP_KERNEL);
2532 if (!hso_net->mux_bulk_rx_buf_pool[i])
2533 goto exit;
2534 }
2535 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2536 if (!hso_net->mux_bulk_tx_urb)
2537 goto exit;
2538 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2539 if (!hso_net->mux_bulk_tx_buf)
2540 goto exit;
2541
2542 add_net_device(hso_dev);
2543
2544 /* registering our net device */
2545 result = register_netdev(net);
2546 if (result) {
2547 dev_err(&interface->dev, "Failed to register device\n");
2548 goto exit;
2549 }
2550
2551 hso_log_port(hso_dev);
2552
2553 hso_create_rfkill(hso_dev, interface);
2554
2555 return hso_dev;
2556exit:
2557 hso_free_net_device(hso_dev, true);
2558 return NULL;
2559}
2560
2561static void hso_free_tiomget(struct hso_serial *serial)
2562{
2563 struct hso_tiocmget *tiocmget;
2564 if (!serial)
2565 return;
2566 tiocmget = serial->tiocmget;
2567 if (tiocmget) {
2568 usb_free_urb(tiocmget->urb);
2569 tiocmget->urb = NULL;
2570 serial->tiocmget = NULL;
2571 kfree(tiocmget->serial_state_notification);
2572 tiocmget->serial_state_notification = NULL;
2573 kfree(tiocmget);
2574 }
2575}
2576
2577/* Frees an AT channel ( goes for both mux and non-mux ) */
2578static void hso_free_serial_device(struct hso_device *hso_dev)
2579{
2580 struct hso_serial *serial = dev2ser(hso_dev);
2581
2582 if (!serial)
2583 return;
2584
2585 hso_serial_common_free(serial);
2586
2587 if (serial->shared_int) {
2588 mutex_lock(&serial->shared_int->shared_int_lock);
2589 if (--serial->shared_int->ref_count == 0)
2590 hso_free_shared_int(serial->shared_int);
2591 else
2592 mutex_unlock(&serial->shared_int->shared_int_lock);
2593 }
2594 hso_free_tiomget(serial);
2595 kfree(serial);
2596 kfree(hso_dev);
2597}
2598
2599/* Creates a bulk AT channel */
2600static struct hso_device *hso_create_bulk_serial_device(
2601 struct usb_interface *interface, int port)
2602{
2603 struct hso_device *hso_dev;
2604 struct hso_serial *serial;
2605 int num_urbs;
2606 struct hso_tiocmget *tiocmget;
2607
2608 hso_dev = hso_create_device(interface, port);
2609 if (!hso_dev)
2610 return NULL;
2611
2612 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2613 if (!serial)
2614 goto exit;
2615
2616 serial->parent = hso_dev;
2617 hso_dev->port_data.dev_serial = serial;
2618
2619 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2620 num_urbs = 2;
2621 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2622 GFP_KERNEL);
2623 serial->tiocmget->serial_state_notification
2624 = kzalloc(sizeof(struct hso_serial_state_notification),
2625 GFP_KERNEL);
2626 /* it isn't going to break our heart if serial->tiocmget
2627 * allocation fails don't bother checking this.
2628 */
2629 if (serial->tiocmget && serial->tiocmget->serial_state_notification) {
2630 tiocmget = serial->tiocmget;
2631 tiocmget->endp = hso_get_ep(interface,
2632 USB_ENDPOINT_XFER_INT,
2633 USB_DIR_IN);
2634 if (!tiocmget->endp) {
2635 dev_err(&interface->dev, "Failed to find INT IN ep\n");
2636 goto exit;
2637 }
2638
2639 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2640 if (tiocmget->urb) {
2641 mutex_init(&tiocmget->mutex);
2642 init_waitqueue_head(&tiocmget->waitq);
2643 } else
2644 hso_free_tiomget(serial);
2645 }
2646 }
2647 else
2648 num_urbs = 1;
2649
2650 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2651 BULK_URB_TX_SIZE))
2652 goto exit;
2653
2654 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2655 USB_DIR_IN);
2656 if (!serial->in_endp) {
2657 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2658 goto exit2;
2659 }
2660
2661 if (!
2662 (serial->out_endp =
2663 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2664 dev_err(&interface->dev, "Failed to find BULK OUT ep\n");
2665 goto exit2;
2666 }
2667
2668 serial->write_data = hso_std_serial_write_data;
2669
2670 /* and record this serial */
2671 set_serial_by_index(serial->minor, serial);
2672
2673 /* setup the proc dirs and files if needed */
2674 hso_log_port(hso_dev);
2675
2676 /* done, return it */
2677 return hso_dev;
2678
2679exit2:
2680 hso_serial_tty_unregister(serial);
2681 hso_serial_common_free(serial);
2682exit:
2683 hso_free_tiomget(serial);
2684 kfree(serial);
2685 kfree(hso_dev);
2686 return NULL;
2687}
2688
2689/* Creates a multiplexed AT channel */
2690static
2691struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2692 int port,
2693 struct hso_shared_int *mux)
2694{
2695 struct hso_device *hso_dev;
2696 struct hso_serial *serial;
2697 int port_spec;
2698
2699 port_spec = HSO_INTF_MUX;
2700 port_spec &= ~HSO_PORT_MASK;
2701
2702 port_spec |= hso_mux_to_port(port);
2703 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2704 return NULL;
2705
2706 hso_dev = hso_create_device(interface, port_spec);
2707 if (!hso_dev)
2708 return NULL;
2709
2710 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2711 if (!serial)
2712 goto exit;
2713
2714 hso_dev->port_data.dev_serial = serial;
2715 serial->parent = hso_dev;
2716
2717 if (hso_serial_common_create
2718 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2719 goto exit;
2720
2721 serial->tx_data_length--;
2722 serial->write_data = hso_mux_serial_write_data;
2723
2724 serial->shared_int = mux;
2725 mutex_lock(&serial->shared_int->shared_int_lock);
2726 serial->shared_int->ref_count++;
2727 mutex_unlock(&serial->shared_int->shared_int_lock);
2728
2729 /* and record this serial */
2730 set_serial_by_index(serial->minor, serial);
2731
2732 /* setup the proc dirs and files if needed */
2733 hso_log_port(hso_dev);
2734
2735 /* done, return it */
2736 return hso_dev;
2737
2738exit:
2739 if (serial) {
2740 tty_unregister_device(tty_drv, serial->minor);
2741 kfree(serial);
2742 }
2743 kfree(hso_dev);
2744 return NULL;
2745
2746}
2747
2748static void hso_free_shared_int(struct hso_shared_int *mux)
2749{
2750 usb_free_urb(mux->shared_intr_urb);
2751 kfree(mux->shared_intr_buf);
2752 mutex_unlock(&mux->shared_int_lock);
2753 kfree(mux);
2754}
2755
2756static
2757struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2758{
2759 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2760
2761 if (!mux)
2762 return NULL;
2763
2764 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2765 USB_DIR_IN);
2766 if (!mux->intr_endp) {
2767 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2768 goto exit;
2769 }
2770
2771 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2772 if (!mux->shared_intr_urb)
2773 goto exit;
2774 mux->shared_intr_buf =
2775 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2776 GFP_KERNEL);
2777 if (!mux->shared_intr_buf)
2778 goto exit;
2779
2780 mutex_init(&mux->shared_int_lock);
2781
2782 return mux;
2783
2784exit:
2785 kfree(mux->shared_intr_buf);
2786 usb_free_urb(mux->shared_intr_urb);
2787 kfree(mux);
2788 return NULL;
2789}
2790
2791/* Gets the port spec for a certain interface */
2792static int hso_get_config_data(struct usb_interface *interface)
2793{
2794 struct usb_device *usbdev = interface_to_usbdev(interface);
2795 u8 *config_data = kmalloc(17, GFP_KERNEL);
2796 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2797 s32 result;
2798
2799 if (!config_data)
2800 return -ENOMEM;
2801 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2802 0x86, 0xC0, 0, 0, config_data, 17,
2803 USB_CTRL_SET_TIMEOUT) != 0x11) {
2804 kfree(config_data);
2805 return -EIO;
2806 }
2807
2808 /* check if we have a valid interface */
2809 if (if_num > 16) {
2810 kfree(config_data);
2811 return -EINVAL;
2812 }
2813
2814 switch (config_data[if_num]) {
2815 case 0x0:
2816 result = 0;
2817 break;
2818 case 0x1:
2819 result = HSO_PORT_DIAG;
2820 break;
2821 case 0x2:
2822 result = HSO_PORT_GPS;
2823 break;
2824 case 0x3:
2825 result = HSO_PORT_GPS_CONTROL;
2826 break;
2827 case 0x4:
2828 result = HSO_PORT_APP;
2829 break;
2830 case 0x5:
2831 result = HSO_PORT_APP2;
2832 break;
2833 case 0x6:
2834 result = HSO_PORT_CONTROL;
2835 break;
2836 case 0x7:
2837 result = HSO_PORT_NETWORK;
2838 break;
2839 case 0x8:
2840 result = HSO_PORT_MODEM;
2841 break;
2842 case 0x9:
2843 result = HSO_PORT_MSD;
2844 break;
2845 case 0xa:
2846 result = HSO_PORT_PCSC;
2847 break;
2848 case 0xb:
2849 result = HSO_PORT_VOICE;
2850 break;
2851 default:
2852 result = 0;
2853 }
2854
2855 if (result)
2856 result |= HSO_INTF_BULK;
2857
2858 if (config_data[16] & 0x1)
2859 result |= HSO_INFO_CRC_BUG;
2860
2861 kfree(config_data);
2862 return result;
2863}
2864
2865/* called once for each interface upon device insertion */
2866static int hso_probe(struct usb_interface *interface,
2867 const struct usb_device_id *id)
2868{
2869 int mux, i, if_num, port_spec;
2870 unsigned char port_mask;
2871 struct hso_device *hso_dev = NULL;
2872 struct hso_shared_int *shared_int;
2873 struct hso_device *tmp_dev = NULL;
2874
2875 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2876 dev_err(&interface->dev, "Not our interface\n");
2877 return -ENODEV;
2878 }
2879
2880 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2881
2882 /* Get the interface/port specification from either driver_info or from
2883 * the device itself */
2884 if (id->driver_info) {
2885 /* if_num is controlled by the device, driver_info is a 0 terminated
2886 * array. Make sure, the access is in bounds! */
2887 for (i = 0; i <= if_num; ++i)
2888 if (((u32 *)(id->driver_info))[i] == 0)
2889 goto exit;
2890 port_spec = ((u32 *)(id->driver_info))[if_num];
2891 } else {
2892 port_spec = hso_get_config_data(interface);
2893 if (port_spec < 0)
2894 goto exit;
2895 }
2896
2897 /* Check if we need to switch to alt interfaces prior to port
2898 * configuration */
2899 if (interface->num_altsetting > 1)
2900 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2901 interface->needs_remote_wakeup = 1;
2902
2903 /* Allocate new hso device(s) */
2904 switch (port_spec & HSO_INTF_MASK) {
2905 case HSO_INTF_MUX:
2906 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2907 /* Create the network device */
2908 if (!disable_net) {
2909 hso_dev = hso_create_net_device(interface,
2910 port_spec);
2911 if (!hso_dev)
2912 goto exit;
2913 tmp_dev = hso_dev;
2914 }
2915 }
2916
2917 if (hso_get_mux_ports(interface, &port_mask))
2918 /* TODO: de-allocate everything */
2919 goto exit;
2920
2921 shared_int = hso_create_shared_int(interface);
2922 if (!shared_int)
2923 goto exit;
2924
2925 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2926 if (port_mask & i) {
2927 hso_dev = hso_create_mux_serial_device(
2928 interface, i, shared_int);
2929 if (!hso_dev)
2930 goto exit;
2931 }
2932 }
2933
2934 if (tmp_dev)
2935 hso_dev = tmp_dev;
2936 break;
2937
2938 case HSO_INTF_BULK:
2939 /* It's a regular bulk interface */
2940 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2941 if (!disable_net)
2942 hso_dev =
2943 hso_create_net_device(interface, port_spec);
2944 } else {
2945 hso_dev =
2946 hso_create_bulk_serial_device(interface, port_spec);
2947 }
2948 if (!hso_dev)
2949 goto exit;
2950 break;
2951 default:
2952 goto exit;
2953 }
2954
2955 /* save our data pointer in this device */
2956 usb_set_intfdata(interface, hso_dev);
2957
2958 /* done */
2959 return 0;
2960exit:
2961 hso_free_interface(interface);
2962 return -ENODEV;
2963}
2964
2965/* device removed, cleaning up */
2966static void hso_disconnect(struct usb_interface *interface)
2967{
2968 hso_free_interface(interface);
2969
2970 /* remove reference of our private data */
2971 usb_set_intfdata(interface, NULL);
2972}
2973
2974static void async_get_intf(struct work_struct *data)
2975{
2976 struct hso_device *hso_dev =
2977 container_of(data, struct hso_device, async_get_intf);
2978 usb_autopm_get_interface(hso_dev->interface);
2979}
2980
2981static void async_put_intf(struct work_struct *data)
2982{
2983 struct hso_device *hso_dev =
2984 container_of(data, struct hso_device, async_put_intf);
2985 usb_autopm_put_interface(hso_dev->interface);
2986}
2987
2988static int hso_get_activity(struct hso_device *hso_dev)
2989{
2990 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2991 if (!hso_dev->is_active) {
2992 hso_dev->is_active = 1;
2993 schedule_work(&hso_dev->async_get_intf);
2994 }
2995 }
2996
2997 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2998 return -EAGAIN;
2999
3000 usb_mark_last_busy(hso_dev->usb);
3001
3002 return 0;
3003}
3004
3005static int hso_put_activity(struct hso_device *hso_dev)
3006{
3007 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3008 if (hso_dev->is_active) {
3009 hso_dev->is_active = 0;
3010 schedule_work(&hso_dev->async_put_intf);
3011 return -EAGAIN;
3012 }
3013 }
3014 hso_dev->is_active = 0;
3015 return 0;
3016}
3017
3018/* called by kernel when we need to suspend device */
3019static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3020{
3021 int i, result;
3022
3023 /* Stop all serial ports */
3024 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3025 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3026 result = hso_stop_serial_device(serial_table[i]);
3027 if (result)
3028 goto out;
3029 }
3030 }
3031
3032 /* Stop all network ports */
3033 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3034 if (network_table[i] &&
3035 (network_table[i]->interface == iface)) {
3036 result = hso_stop_net_device(network_table[i]);
3037 if (result)
3038 goto out;
3039 }
3040 }
3041
3042out:
3043 return 0;
3044}
3045
3046/* called by kernel when we need to resume device */
3047static int hso_resume(struct usb_interface *iface)
3048{
3049 int i, result = 0;
3050 struct hso_net *hso_net;
3051
3052 /* Start all serial ports */
3053 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3054 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3055 if (dev2ser(serial_table[i])->port.count) {
3056 result =
3057 hso_start_serial_device(serial_table[i], GFP_NOIO);
3058 hso_kick_transmit(dev2ser(serial_table[i]));
3059 if (result)
3060 goto out;
3061 }
3062 }
3063 }
3064
3065 /* Start all network ports */
3066 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3067 if (network_table[i] &&
3068 (network_table[i]->interface == iface)) {
3069 hso_net = dev2net(network_table[i]);
3070 if (hso_net->flags & IFF_UP) {
3071 /* First transmit any lingering data,
3072 then restart the device. */
3073 if (hso_net->skb_tx_buf) {
3074 dev_dbg(&iface->dev,
3075 "Transmitting"
3076 " lingering data\n");
3077 hso_net_start_xmit(hso_net->skb_tx_buf,
3078 hso_net->net);
3079 hso_net->skb_tx_buf = NULL;
3080 }
3081 result = hso_start_net_device(network_table[i]);
3082 if (result)
3083 goto out;
3084 }
3085 }
3086 }
3087
3088out:
3089 return result;
3090}
3091
3092static void hso_serial_ref_free(struct kref *ref)
3093{
3094 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3095
3096 hso_free_serial_device(hso_dev);
3097}
3098
3099static void hso_free_interface(struct usb_interface *interface)
3100{
3101 struct hso_serial *serial;
3102 int i;
3103
3104 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3105 if (serial_table[i] &&
3106 (serial_table[i]->interface == interface)) {
3107 serial = dev2ser(serial_table[i]);
3108 tty_port_tty_hangup(&serial->port, false);
3109 mutex_lock(&serial->parent->mutex);
3110 serial->parent->usb_gone = 1;
3111 mutex_unlock(&serial->parent->mutex);
3112 cancel_work_sync(&serial_table[i]->async_put_intf);
3113 cancel_work_sync(&serial_table[i]->async_get_intf);
3114 hso_serial_tty_unregister(serial);
3115 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3116 set_serial_by_index(i, NULL);
3117 }
3118 }
3119
3120 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3121 if (network_table[i] &&
3122 (network_table[i]->interface == interface)) {
3123 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3124 /* hso_stop_net_device doesn't stop the net queue since
3125 * traffic needs to start it again when suspended */
3126 netif_stop_queue(dev2net(network_table[i])->net);
3127 hso_stop_net_device(network_table[i]);
3128 cancel_work_sync(&network_table[i]->async_put_intf);
3129 cancel_work_sync(&network_table[i]->async_get_intf);
3130 if (rfk) {
3131 rfkill_unregister(rfk);
3132 rfkill_destroy(rfk);
3133 }
3134 hso_free_net_device(network_table[i], false);
3135 }
3136 }
3137}
3138
3139/* Helper functions */
3140
3141/* Get the endpoint ! */
3142static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3143 int type, int dir)
3144{
3145 int i;
3146 struct usb_host_interface *iface = intf->cur_altsetting;
3147 struct usb_endpoint_descriptor *endp;
3148
3149 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3150 endp = &iface->endpoint[i].desc;
3151 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3152 (usb_endpoint_type(endp) == type))
3153 return endp;
3154 }
3155
3156 return NULL;
3157}
3158
3159/* Get the byte that describes which ports are enabled */
3160static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3161{
3162 int i;
3163 struct usb_host_interface *iface = intf->cur_altsetting;
3164
3165 if (iface->extralen == 3) {
3166 *ports = iface->extra[2];
3167 return 0;
3168 }
3169
3170 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3171 if (iface->endpoint[i].extralen == 3) {
3172 *ports = iface->endpoint[i].extra[2];
3173 return 0;
3174 }
3175 }
3176
3177 return -1;
3178}
3179
3180/* interrupt urb needs to be submitted, used for serial read of muxed port */
3181static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3182 struct usb_device *usb, gfp_t gfp)
3183{
3184 int result;
3185
3186 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3187 usb_rcvintpipe(usb,
3188 shared_int->intr_endp->bEndpointAddress & 0x7F),
3189 shared_int->shared_intr_buf,
3190 1,
3191 intr_callback, shared_int,
3192 shared_int->intr_endp->bInterval);
3193
3194 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3195 if (result)
3196 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3197 result);
3198
3199 return result;
3200}
3201
3202/* operations setup of the serial interface */
3203static const struct tty_operations hso_serial_ops = {
3204 .open = hso_serial_open,
3205 .close = hso_serial_close,
3206 .write = hso_serial_write,
3207 .write_room = hso_serial_write_room,
3208 .cleanup = hso_serial_cleanup,
3209 .ioctl = hso_serial_ioctl,
3210 .set_termios = hso_serial_set_termios,
3211 .chars_in_buffer = hso_serial_chars_in_buffer,
3212 .tiocmget = hso_serial_tiocmget,
3213 .tiocmset = hso_serial_tiocmset,
3214 .get_icount = hso_get_count,
3215 .unthrottle = hso_unthrottle
3216};
3217
3218static struct usb_driver hso_driver = {
3219 .name = driver_name,
3220 .probe = hso_probe,
3221 .disconnect = hso_disconnect,
3222 .id_table = hso_ids,
3223 .suspend = hso_suspend,
3224 .resume = hso_resume,
3225 .reset_resume = hso_resume,
3226 .supports_autosuspend = 1,
3227 .disable_hub_initiated_lpm = 1,
3228};
3229
3230static int __init hso_init(void)
3231{
3232 int i;
3233 int result;
3234
3235 /* put it in the log */
3236 pr_info("%s\n", version);
3237
3238 /* Initialise the serial table semaphore and table */
3239 spin_lock_init(&serial_table_lock);
3240 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3241 serial_table[i] = NULL;
3242
3243 /* allocate our driver using the proper amount of supported minors */
3244 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3245 if (!tty_drv)
3246 return -ENOMEM;
3247
3248 /* fill in all needed values */
3249 tty_drv->driver_name = driver_name;
3250 tty_drv->name = tty_filename;
3251
3252 /* if major number is provided as parameter, use that one */
3253 if (tty_major)
3254 tty_drv->major = tty_major;
3255
3256 tty_drv->minor_start = 0;
3257 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3258 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3259 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3260 tty_drv->init_termios = tty_std_termios;
3261 hso_init_termios(&tty_drv->init_termios);
3262 tty_set_operations(tty_drv, &hso_serial_ops);
3263
3264 /* register the tty driver */
3265 result = tty_register_driver(tty_drv);
3266 if (result) {
3267 pr_err("%s - tty_register_driver failed(%d)\n",
3268 __func__, result);
3269 goto err_free_tty;
3270 }
3271
3272 /* register this module as an usb driver */
3273 result = usb_register(&hso_driver);
3274 if (result) {
3275 pr_err("Could not register hso driver - error: %d\n", result);
3276 goto err_unreg_tty;
3277 }
3278
3279 /* done */
3280 return 0;
3281err_unreg_tty:
3282 tty_unregister_driver(tty_drv);
3283err_free_tty:
3284 put_tty_driver(tty_drv);
3285 return result;
3286}
3287
3288static void __exit hso_exit(void)
3289{
3290 pr_info("unloaded\n");
3291
3292 tty_unregister_driver(tty_drv);
3293 /* deregister the usb driver */
3294 usb_deregister(&hso_driver);
3295 put_tty_driver(tty_drv);
3296}
3297
3298/* Module definitions */
3299module_init(hso_init);
3300module_exit(hso_exit);
3301
3302MODULE_AUTHOR(MOD_AUTHOR);
3303MODULE_DESCRIPTION(MOD_DESCRIPTION);
3304MODULE_LICENSE("GPL");
3305
3306/* change the debug level (eg: insmod hso.ko debug=0x04) */
3307MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3308module_param(debug, int, 0644);
3309
3310/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3311MODULE_PARM_DESC(tty_major, "Set the major tty number");
3312module_param(tty_major, int, 0644);
3313
3314/* disable network interface (eg: insmod hso.ko disable_net=1) */
3315MODULE_PARM_DESC(disable_net, "Disable the network interface");
3316module_param(disable_net, int, 0644);